docs: add poetry installation info to contributing

CONTRIBUTING.md

@@ -1,28 +1,68 @@
 # Contributing
 Contributions are welcome! Make sure to first open an issue discussing the problem or the new feature before creating a pull request. This project uses [poetry](https://python-poetry.org/).
 
+## Installation
+Python and poetry are used for the dependency and build management.
+
+### Install Poetry
+[Poetry](https://python-poetry.org/) can be installed with `pip` on most systems, but the direct installer on windows systems may work better.
+
+#### Linux/MacOS
+```bash
+$ pip install poetry
+```
+
+#### Windows
+```bash
+$ (Invoke-WebRequest -Uri https://install.python-poetry.org -UseBasicParsing).Content | python -
+```
+or 
+```bash
+$ (Invoke-WebRequest -Uri https://install.python-poetry.org -UseBasicParsing).Content | py -
+```
+
+### Install Dependencies
+Once poetry is installed, the dependencies can be installed with the following command
+```bash
+$ poetry install --with dev
+```
+
+### Open Shell
+The virtualenv can be accessed using the following command to avoid prepending `poetry run` to every command
+```bash
+$ poetry shell
+```
+
+
 ## Code Style
 The code follows the [black](https://github.com/psf/black) code style. Import statements are sorted with [isort](https://pycqa.github.io/isort/). The project must type-check with [pyright](https://github.com/microsoft/pyright). It is recommend to run the type-checker via the VSCode Python extension (discussed below).
 
-**Format**
+**Reformat**
 ```bash
 # omit `poetry run` if u have the virtualenv activated
 $ poetry run isort beet_observer
 $ poetry run black beet_observer
 ```
 
-**Check**
+**Check Formatting**
 ```bash
 # omit `poetry run` if u have the virtualenv activated
 $ poetry run black --check beet_observer
 $ poetry run isort --check-only beet_observer
 ```
 
+**Type check**
+```bash
+# omit `poetry run` if u have the virtualenv activated
+$ poetry run pyright
+```
+
 You can run `poetry self add 'poethepoet[poetry_plugin]'` to get access to an easier set of commands:
 ```bash
 # omit `poetry` if u have the virtualenv activated
 $ poetry poe format
 $ poetry poe check
+$ poetry poe typing
 ```
 
 ## IDE

pyproject.toml

@@ -38,6 +38,7 @@ typeCheckingMode = "strict"
 [tool.poe.tasks]
 format = {shell = "isort beet_observer & black beet_observer"}
 check = {shell = "isort --check-only beet_observer & black --check beet_observer"}
+typing = {shell = "pyright"}
 
 [build-system]
 requires = ["poetry-core"]