[ADDED]: Lock new Issues workflow

.github/workflows/lock.yml

@@ -0,0 +1,21 @@
+    name: Lock new issues
+    on:
+      issues:
+        types: opened
+    permissions:
+      issues: write
+    jobs:
+      action:
+        runs-on: ubuntu-latest
+        steps:
+          - name: Lock issues
+            uses: dessant/repo-lockdown@v3
+            with:
+              close-issue: false
+              exclude-issue-labels: gssoc23.
+              process-only: issues
+              skip-closed-issue-comment: true
+              issue-comment: >
+                To reduce notifications, issues are locked. Your issue will be
+                unlocked when we add the label `gssoc23`. If you're participating in
+                GSSoC'23, please add the `gssoc23` label to your issue.