[CI] Add Versioning Pipeline

.github/workflows/versioning.yaml

@@ -0,0 +1,57 @@
+name: Versioning
+on:
+  push:
+    # Will not trigger on a release candidate
+    tags: [ 'v[0-9]+.[0-9]+.[0-9]+' ]
+
+jobs:
+  versioning:
+    name: versioning
+    runs-on: ubuntu-latest
+    steps:
+      # Clone the pushed tag
+      - name: Clone tag
+        uses: actions/checkout@v4
+
+      # Check logs with main to prevent issues when pushing
+      - name: Ensure tag is current with main
+        run: |
+          git fetch origin
+          if [[ -n $(git log HEAD..origin/main --oneline) ]]; then
+            echo "❌ Your tag is missing commits from origin/main."
+            echo -e "\u2014 Pull from main before pushing tag."
+            exit 1
+          else
+            echo "✅ Your tag has all commits from origin/main!"
+          fi
+
+      # Get the tag for the prior version
+      - name: Get prior version
+        id: get_tag
+        run: |
+          PRIOR_VERSION=$(git tag -l --sort=-v:refname | grep -E "v?[0-9]+\.[0-9]+\.[0-9]+$" | head -n 1 | sed "s/v//g" | sed "s/\./-/g")
+          echo "PRIOR_VERSION=$PRIOR_VERSION" >> $GITHUB_ENV
+          echo "Prior version tag: $PRIOR_VERSION"
+
+      # Clone the prior tag
+      - name: Clone prior branch
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ steps.get_tag.outputs.PRIOR_VERSION }}
+          path: prior
+          fetch-depth: 0
+
+      # Move latest of the prior tag to corresponding version folder
+      - name: Move prior latest to versions
+        shell: bash
+        run: |
+          mkdir "content/versions/$PRIOR_VERSION"
+          cp -r prior/content/latest "content/versions/$PRIOR_VERSION"
+          rm -r prior
+
+      # Commit everything to main
+      - name: Commit and replace
+        run: |
+          git add .
+          git commit -m "Migrated ${{ github.ref_name }} into latest"
+          git push origin main