feat: Add MkDocs site and deployment workflow

This commit introduces a documentation website built with MkDocs and the Material theme.

Key changes:
- Added a `mkdocs.yml` configuration file.
- Renamed `docs/README.md` to `docs/index.md` to serve as the site's homepage.
- Created a GitHub Actions workflow (`.github/workflows/mkdocs.yml`) to automatically build and deploy the site to GitHub Pages on pushes to the `main` branch.

.github/workflows/mkdocs.yml

@@ -0,0 +1,15 @@
+name: mkdocs
+on:
+  push:
+    branches:
+      - main
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.x
+      - run: pip install mkdocs-material
+      - run: mkdocs gh-deploy --force

mkdocs.yml

@@ -0,0 +1,4 @@
+site_name: Borg Data Collector
+repo_url: https://github.com/Snider/Borg
+theme:
+  name: material