Add pytest to dev dependencies;

upgrade dev dependencies;
remove unnecessary main test script entrypoint;
remove unnecessary line from `.gitignore`;
put repo description variable into top-level `__init__.py`;
introduce syntax-error as a reminder to fix copyright;
add CSS fix for broken inline-code segments;
update `index.md` layout;
reorder linting script calls and add a bit more output;
support Python 3.8+ by default;
fix wrong dependency file reference in `pyproject.toml`;
add `pytest` config to `pyproject.toml`;
call `pytest` in `coverage` config;
add a few sensible rule-ignores to `ruff` config

docs/css/extra.css

@@ -0,0 +1,3 @@
+.md-typeset code {
+    word-break: keep-all;  /* Prevent inline-code from being broken up. */
+}

docs/index.md

@@ -4,23 +4,25 @@
 
 ---
 
-| [📑 Documentation][1] | [🧑‍💻 Source Code][2] | [🐛 Bug Tracker][3] |
-|-----------------------|------------------------|---------------------|
+[📑 Documentation][1]   |   [🧑‍💻 Source Code][2]   |   [🐛 Bug Tracker][3]
 
 ---
 
-## Usage
-
-...
-
 ## Installation
 
 `pip install ${REPO_NAME}`
 
+## Usage
+
+...
+
 ## Dependencies
 
-Python Version ..., OS ...
+Python `>=3.8`, OS agnostic
 
+---
+
+© 2023 ...
 
 [1]: https://${REPO_OWNER_LOWER}.github.io/${REPO_NAME_LOWER}
 [2]: https://github.com/${REPO_OWNER_LOWER}/${REPO_NAME_LOWER}