Add Package Structure docs and configuration usage example

docs-src/webqueue2api Package/Package Structure.md

@@ -0,0 +1,25 @@
+## Hierarchy
+
+The webqueue2api Package consists of four packages in total: 
+
+- `webqueue2api`: The root packages. This contains both the `api` and the `parser` packages as well as global configuration.
+    - `api`: Contains a [Flask](https://flask.palletsprojects.com/) app that can be used with any WSGI server to host the webqueue2 API and utilities such as authentication code.
+        - `resources`: Contains [Flask-RESTful](https://flask-restful.readthedocs.io/en/latest/) resources for the webqueue2 API.
+    - `parser`: Contains parers for a Queue and an Item as well as utilities and custom errors.
+
+## Configuration
+Each package contains package level configuration objects (see: [dataclasses on PyPI](https://pypi.org/project/dataclasses/)) in `config.py` files. All of the configurations are combined into the top level `webqueue2api.config` symbol.
+
+These configuration objects store default values for each package. Default values can be changed by editing these objects directly or by editing the object values before their use.
+
+!!! example "Changing the parser's queue directory by editing object values."
+    ```python
+    import webqueue2api
+
+    # Load Queue from default directory
+    ce_queue = Queue("ce")
+
+    # load Queue from modified directory
+    webqueue2api.config.parser.queue_directory = "/absolute/path"
+    other_queue = Queue("other")
+    ```

docs-src/webqueue2api Package/awesome-pages.yaml

@@ -1,4 +1,5 @@
 # YAML Configuration for Awesome Pages mkdocs Plugin
 # See: https://github.com/lukasgeiter/mkdocs-awesome-pages-plugin
 nav:
-    - ...
+    - Getting Started.md
+    - Package Structure.md