Documentation Website (#380)

* Move to mkdocs for docs

* Deploy task

* Custom landing page

* Setup Google Analytics

* Cropped animation

* Update docs/theme/overrides/home.html

Co-authored-by: Nikolay Edigaryev <edigaryev@gmail.com>

* Direct to website and discussions

Co-authored-by: Nikolay Edigaryev <edigaryev@gmail.com>

docs/github-actions.md

@@ -0,0 +1,26 @@
+---
+hide:
+  - navigation
+---
+
+# GitHub Actions
+
+Tart already powers several CI services mentioned above including our own [Cirrus CI](https://cirrus-ci.org/guide/macOS/) which offers unlimited concurrency with per-second billing.
+For services that haven't leveraged Tart yet, we offer fully managed runners via a monthly subscription.
+*Cirrus Runners* is the fastest way to get your current CI workflows to benefit from Apple Silicon hardware. No need to manage infrastructure or migrate to another CI provider.
+
+## Configuring Cirrus Runners
+
+Configuring Cirrus Runners for GitHub Actions is as simple as installing [Cirrus Runners App](https://github.com/apps/cirrus-runners).
+After successful installation and subscription configuration, use any of [Ventura images managed by us](https://github.com/cirruslabs/macos-image-templates) in `runs-on`:
+
+```yaml
+name: Test Suite
+jobs:
+  test:
+    runs-on: ghcr.io/cirruslabs/macos-ventura-xcode:latest
+```
+
+When workflows are executing you'll see Cirrus on-demand runners on your organization's settings page at `https://github.com/organizations/<ORGANIZATION>/settings/actions/runners`.
+
+![](/assets/images/TartGHARunners.png)