Pre-release 0.4: support for Crypt4GH header.

- add example usage to documentation
- update version to 0.4
- ensure packet_header documentation is generated

docs/implementation.md

@@ -22,4 +22,6 @@ Crypt4GH Container
 
 ::: oarepo_c4gh.crypt4gh.header
 
+::: oarepo_c4gh.crypt4gh.header_packet
+
 ::: oarepo_c4gh.crypt4gh.util

docs/index.md

@@ -45,3 +45,15 @@ Once the key is loaded, one can always obtain its public part:
 print(my_key.get_public_key())
 print(my_secret_key.get_public_key())
 ```
+
+### Loading Crypt4GH Containers
+
+With secret key loaded, initializing Crypt4GH container for reading
+with actual container data is straightforward:
+
+```python
+from oarepo_c4gh import Crypt4GH
+
+with open("hello.txt.c4gh") as f:
+	crypt4gh = Crypt4GH(my_secret_key, f)
+```

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "oarepo_c4gh"
-version = "0.3"
+version = "0.4"
 authors = [
   { name = "Dominik Pantůček", email = "[email protected]" }
 ]