add simple cli entrypoints for api functionality

like:
```
$ ls bin/
block_attack			get_app_flavor			get_block_attack_descriptions	get_flows			get_sla				get_whitelist_rules
command				get_app_info			get_cluster_relations		get_next_best_plan_for_app	get_slas			validate_app_name
get_app_configurations		get_available_backups_for_app	get_eav_description		get_product_info		get_whitelist_options

hypernode-api-python]$ ./bin/get_sla --help
usage: get_sla [-h] sla_code

Get a specific SLA.

$ ./bin/get_sla sla-standard
{
  "id": 123,
  "code": "sla-standard",
  "name": "SLA Standard",
  "price": 1234,
  "billing_period": 1,
  "billing_period_unit": "month"
}

positional arguments:
  sla_code    The code of the SLA to get

optional arguments:
  -h, --help  show this help message and exit
```

.github/workflows/test.yaml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
 
     steps:
       - uses: actions/checkout@v3

README.md

@@ -18,6 +18,36 @@ pip install -r requirements/development.txt
 
 Each Hypernode has an API token associated with it, you can use that to talk to the API directly. You can find the token in `/etc/hypernode/hypernode_api_token`. For API tokens with special permissions please contact [email protected]. Not all functionality in the API is currently generally available but if you'd like to start automating and have an interesting use-case we'd love to hear from you.
 
+## Using the library from the commandline
+
+In the `bin/` directory you'll find entry points to interact with the API directly from the commandline.
+
+See for example:
+```bash
+$ export PYTHONPATH=.
+
+$ ./bin/get_slas --help
+usage: get_slas [-h]
+
+List all available SLAs.
+
+Example:
+$ ./bin/get_slas
+[
+  {
+    "id": 123,
+    "code": "sla-standard",
+    "name": "SLA Standard",
+    "price": 1234,
+    "billing_period": 1,
+    "billing_period_unit": "month"
+  },
+  ...
+]
+
+optional arguments:
+  -h, --help  show this help message and exit
+```
 
 ### Installing the library in your project
 
@@ -56,7 +86,7 @@ client.set_app_setting('yourhypernodeappname', 'php_version', '8.1').json()
 {'name': 'yourhypernodeappname', 'type': 'persistent', 'php_version': '8.1', ...}
 ```
 
-To even performing acts of cloud automation, like scaling to the first next larger plan:
+You can even perform acts of cloud automation, like scaling to the first next larger plan:
 ```python
 client.xgrade(
     'yourhypernodeappname',

bin/block_attack

@@ -0,0 +1 @@
+command

bin/command

@@ -0,0 +1,14 @@
+#!/usr/bin/env python3
+import os
+import sys
+from hypernode_api_python import commands
+
+
+if __name__ == '__main__':
+    command = os.path.basename(__file__)
+
+    if hasattr(commands, command):
+        sys.exit(getattr(commands, command)() or 0)
+    else:
+        sys.stderr.write("Command '{}' not found in hypernode_api_python.commands\n".format(command))
+        sys.exit(1)

bin/get_app_configurations

@@ -0,0 +1 @@
+command

bin/get_app_flavor

@@ -0,0 +1 @@
+command

bin/get_app_info

@@ -0,0 +1 @@
+command

bin/get_available_backups_for_app

@@ -0,0 +1 @@
+command

bin/get_block_attack_descriptions

@@ -0,0 +1 @@
+command

bin/get_cluster_relations

@@ -0,0 +1 @@
+command

bin/get_eav_description

@@ -0,0 +1 @@
+command

bin/get_flows

@@ -0,0 +1 @@
+command

bin/get_next_best_plan_for_app

@@ -0,0 +1 @@
+command

bin/get_product_info

@@ -0,0 +1 @@
+command

bin/get_sla

@@ -0,0 +1 @@
+command

bin/get_slas

@@ -0,0 +1 @@
+command

bin/get_whitelist_options

@@ -0,0 +1 @@
+command

bin/get_whitelist_rules

@@ -0,0 +1 @@
+command

bin/validate_app_name

@@ -0,0 +1 @@
+command

hypernode_api_python/client.py

@@ -331,6 +331,7 @@ def get_app_eav_description(self):
         """
         return self.requests("GET", HYPERNODE_API_APP_EAV_DESCRIPTION_ENDPOINT)
 
+    # TODO: add entrypoint for this method in bin/ and commands.py
     def set_app_setting(self, app_name, attribute, value):
         """
         Update a setting on the app, like the PHP or MySQL version. See
@@ -384,7 +385,7 @@ def get_app_configurations(self):
         return self.requests("GET", HYPERNODE_API_APP_CONFIGURATION_ENDPOINT)
 
     def get_cluster_relations(self, app_name):
-        """ "
+        """
         List all relations for the specified app. This will return all the
         relations that are currently configured for the specified app.
 
@@ -579,6 +580,7 @@ def get_whitelist_rules(self, app_name, filter_data=None):
             "GET", HYPERNODE_API_WHITELIST_ENDPOINT.format(app_name), filter_data
         )
 
+    # TODO: add entrypoint for this method in bin/ and commands.py
     def get_current_product_for_app(self, app_name):
         """
         Retrieve information about the product the specified App is currently on.
@@ -647,6 +649,7 @@ def get_current_product_for_app(self, app_name):
             "GET", HYPERNODE_API_PRODUCT_APP_DETAIL_ENDPOINT.format(app_name)
         )
 
+    # TODO: add entrypoint for this method in bin/ and commands.py
     def check_payment_information_for_app(self, app_name):
         """
         Get the payment information that is currently configured for this Hypernode
@@ -664,6 +667,7 @@ def check_payment_information_for_app(self, app_name):
             "GET", HYPERNODE_API_APP_CHECK_PAYMENT_INFORMATION.format(app_name)
         )
 
+    # TODO: add entrypoint for this method in bin/ and commands.py
     def get_active_products(self):
         """
         Retrieve the list of products that are currently available. You can
@@ -731,6 +735,7 @@ def get_active_products(self):
         """
         return self.requests("GET", HYPERNODE_API_PRODUCT_LIST_ENDPOINT)
 
+    # TODO: add entrypoint for this method in bin/ and commands.py
     def check_xgrade(self, app_name, product_code):
         """
         Checks if the Hypernode 'is going to fit' on the new product. Retrieves some
@@ -759,6 +764,7 @@ def check_xgrade(self, app_name, product_code):
             HYPERNODE_API_APP_XGRADE_CHECK_ENDPOINT.format(app_name, product_code),
         )
 
+    # TODO: add entrypoint for this method in bin/ and commands.py
     def xgrade(self, app_name, data):
         """
         Change the product of a Hypernode to a different plan. This will initiate
@@ -780,6 +786,7 @@ def xgrade(self, app_name, data):
             "PATCH", HYPERNODE_API_APP_XGRADE_ENDPOINT.format(app_name), data=data
         )
 
+    # TODO: add entrypoint for this method in bin/ and commands.py
     def order_hypernode(self, data):
         """
         Orders a new Hypernode. Note that you can not do this with the API permissions
@@ -799,6 +806,7 @@ def order_hypernode(self, data):
         """
         return self.requests("POST", HYPERNODE_API_APP_ORDER_ENDPOINT, data=data)
 
+    # TODO: add entrypoint for this method in bin/ and commands.py
     def get_active_branchers(self, app_name):
         """
         List all active brancher nodes of your Hypernode.
@@ -838,6 +846,7 @@ def get_active_branchers(self, app_name):
             "GET", HYPERNODE_API_BRANCHER_APP_ENDPOINT.format(app_name)
         )
 
+    # TODO: add entrypoint for this method in bin/ and commands.py
     def create_brancher(self, app_name, data):
         """
         Create a new branch (server replica) of your Hypernode.
@@ -851,6 +860,7 @@ def create_brancher(self, app_name, data):
             "POST", HYPERNODE_API_BRANCHER_APP_ENDPOINT.format(app_name), data=data
         )
 
+    # TODO: add entrypoint for this method in bin/ and commands.py
     def destroy_brancher(self, brancher_name):
         """
         Destroy an existing brancher node of your Hypernode.