Add dev release workflow

.github/workflows/dev-release.yml

@@ -0,0 +1,70 @@
+name: DEV Release Workflow
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version to release'
+        required: true
+      base-branch:
+        description: 'Base branch'
+        required: true
+
+env:
+  COMMIT_EMAIL: [email protected]
+  DEFAULT_PYTHON_VERSION: "3.10"
+  GITHUB_TOKEN: ${{ secrets.RASASDK_GITHUB_TOKEN }}
+
+jobs:
+  prepare-dev-release:
+    name: Prepare DEV Release
+    if: ${{ github.event_name == 'workflow_dispatch' }}
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          fetch-depth: 0
+
+      - name: Check version format
+        run: |
+          version="$INPUT_VERSION"
+          
+          # Check if version is in format number.number.number.dev
+          if ! [[ $version =~ ^[0-9]+\.[0-9]+(\.[0-9]+)?\.dev[0-9]+$ ]]; then
+            echo "Invalid version format. It should be in format 'number.number.number.dev'."
+            exit 1
+          fi
+        env:
+          INPUT_VERSION: ${{ github.event.inputs.version }}        
+
+      - name: Check-out base branch
+        run: |
+          git checkout $BASE_BRANCH
+          git branch
+        env:
+          BASE_BRANCH: ${{ github.event.inputs.base-branch }}
+
+      - name: Setup Python Environment
+        uses: ./.github/actions/setup-python-env
+        with:
+            PYTHON_VERSION: ${{ env.DEFAULT_PYTHON_VERSION }}
+
+      - name: Prepare the release
+        run:  |
+          git config user.name "rasabot"
+          git config user.email "[email protected]"
+          poetry run python scripts/release.py --next_version $INPUT_VERSION
+        env:
+          INPUT_VERSION: ${{ github.event.inputs.version }}
+
+      - name: Create pull request
+        uses: devops-infra/action-pull-request@e66e2ba93519dc63b9884a26e620e2fd0cffab2c # v0.5.5
+        with:
+          github_token: ${{ env.GITHUB_TOKEN }}
+          source_branch: prepare-release-${{ env.INPUT_VERSION }}
+          target_branch: ${{ env.base_branch }}
+          body: "**Automated pull request for Rasa SDK release.**"
+          title: Release ${{ github.event.inputs.version }}
+        env:
+          INPUT_VERSION: ${{ github.event.inputs.version }}