feat: add workflow_dispatch to docs (ChainSafe#6235)

.github/workflows/docs.yml

@@ -4,21 +4,52 @@ on:
   push:
     branches:
       - stable
+  workflow_dispatch:
+    inputs:
+      ref:
+        description: 'Ref to deploy, defaults to `unstable`'
+        required: false
+        default: 'unstable'
+        type: string
 
 jobs:
   docs:
     runs-on: buildjet-4vcpu-ubuntu-2204
+    env:
+      DEPLOY_REF: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.ref || 'stable' }}
     steps:
-      # <common-build> - Uses YAML anchors in the future
+      # Validation step for workflow_dispatch ref input
+      - name: Validate Ref
+        if: github.event_name == 'workflow_dispatch'
+        run: |
+          if git rev-parse "${{ env.DEPLOY_REF }}" >/dev/null 2>&1; then
+            echo "Ref ${{ env.DEPLOY_REF }} is valid."
+          else
+            echo "Error: Ref ${{ env.DEPLOY_REF }} is not a valid branch, tag or commit." >&2
+            exit 1
+          fi
+
+      # Log out the ref being deployed
+      - name: Log Deployment Ref
+        if: github.event_name == 'workflow_dispatch'
+        run: |
+          echo "Deploying ref: $DEPLOY_REF"
+
+      # Checkout the correct ref being deployed
       - uses: actions/checkout@v3
+        with:
+          ref: ${{ env.DEPLOY_REF }}
+
       - uses: actions/setup-node@v3
         with:
           node-version: 20
           check-latest: true
           cache: yarn          
+
       - name: Node.js version
         id: node
         run: echo "v8CppApiVersion=$(node --print "process.versions.modules")" >> $GITHUB_OUTPUT
+
       - name: Restore dependencies
         uses: actions/cache@master
         id: cache-deps
@@ -27,13 +58,14 @@ jobs:
             node_modules
             packages/*/node_modules
           key: ${{ runner.os }}-${{ steps.node.outputs.v8CppApiVersion }}-${{ hashFiles('**/yarn.lock', '**/package.json') }}
+
       - name: Install & build
         if: steps.cache-deps.outputs.cache-hit != 'true'
         run: yarn install --frozen-lockfile && yarn build
+
       - name: Build
         run: yarn build
         if: steps.cache-deps.outputs.cache-hit == 'true'
-      # </common-build>
 
       - name: Build and collect docs
         run: yarn build:docs