✨ feat: add pull request template and enforce branching strategy in workflow

.github/workflows/pr-target-branch-check.yml

@@ -0,0 +1,21 @@
+name: Check PR Branching Strategy
+on:
+  pull_request:
+    types: [opened, synchronize, reopened, edited]
+
+jobs:
+  check-branching-strategy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Enforce branching strategy
+        run: |
+          if [[ "${{ github.base_ref }}" == "main" ]]; then
+            if [[ "${{ github.head_ref }}" != "alpha" ]]; then
+              echo "Error: Pull requests to 'main' are only allowed from the 'alpha' branch."
+              exit 1
+            fi
+          elif [[ "${{ github.base_ref }}" != "alpha" ]]; then
+            echo "Error: Pull requests must be targeted to the 'alpha' or 'main' branch."
+            exit 1
+          fi
+          echo "Branching strategy check passed."