chore: add unlock-lock-issue workflow

.github/config/lock_unlock_issue.yml

@@ -0,0 +1,12 @@
+"🚦 status: awaiting approval":
+  issues:
+    comment: >
+      To reduce notifications, issues are locked until they are valid/approved and to be assigned. In the meantime read the contributing guidelines -> https://github.com/Dun-sin/Whisper/blob/main/CONTRIBUTING.md
+    unlock: true
+    lock: true
+
+"🏁 status: ready for dev":
+  issues:
+    comment: >
+      The issue has been unlocked and is now ready for dev. If you would like to work on this issue, you can comment to have it assigned to you.
+    unlock: true

.github/workflows/unlock-lock-issue.yml

@@ -0,0 +1,17 @@
+name: "lock/unlock issue"
+
+on:
+  issues:
+    types: labeled
+
+permissions:
+  issues: write
+
+jobs:
+  action:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dessant/label-actions@v3
+        with:
+          process-only: issues
+          config-path: .github/config/lock_unlock_issue.yml