ci: Combine logic of crowdin pull and crowdin merge into single action

Author: LisoUseInAIKyrios

.github/workflows/crowdin_merge.yml

@@ -1,4 +1,4 @@
-name: Crowdin pull to GitHub
+name: Crowdin pull and merge
 
 on:
   schedule:
@@ -37,3 +37,32 @@ jobs:
         run: |
           git checkout -B crowdin
           git push --force origin crowdin
+
+  merge:
+    name: Squash merge Crowdin into Dev
+    if: github.event_name == 'workflow_dispatch'
+    needs: pull
+    permissions:
+      contents: write
+    runs-on: ubuntu-latest
+    steps:
+      # Step 1: Checkout dev branch
+      - name: Checkout dev
+        uses: actions/checkout@v5
+        with:
+          ref: dev
+          fetch-depth: 0
+          clean: true
+
+      # Step 2: Fetch the latest crowdin branch
+      - name: Fetch crowdin branch
+        run: git fetch origin crowdin
+
+      # Step 3: Squash merge crowdin into dev
+      - name: Squash merge crowdin into dev
+        run: |
+          git config --local user.name "Crowdin Bot"
+          git config --local user.email "support+bot@crowdin.com"
+          git merge --squash origin/crowdin
+          git commit --allow-empty -m "chore: Update translations from Crowdin"
+          git push origin dev