docs: add support for docs versioning (#1239)

Author: kozub

.github/workflows/on-doc-merge.yml

@@ -0,0 +1,21 @@
+name: Docs
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - "docs/**"
+      - "mkdocs.yml"
+
+jobs:
+  release-docs:
+    permissions:
+      contents: write
+      pages: write
+      id-token: write
+    secrets: inherit
+    uses: ./.github/workflows/reusable-publish-docs.yml
+    with:
+      version: main
+      alias: stage