feat: add workflow to automatically assign GSSoC 2026 labels to project milestones

Author: JhaSourav07

.github/workflows/milestone-manager.yml

@@ -0,0 +1,47 @@
+name: Milestone Manager
+
+on:
+  issues:
+    types: [labeled]
+  pull_request:
+    types: [labeled]
+
+permissions:
+  issues: write
+  pull-requests: write
+
+jobs:
+  assign-to-milestone:
+    if: >
+      github.event.label.name == 'GSSoC 2026' ||
+      github.event.label.name == 'gssoc:approved'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Assign to GSSoC 2026 Milestone
+        uses: actions/github-script@v7
+        env:
+          # Update this to match your actual GSSoC 2026 milestone number.
+          # Find it at: https://github.com/<owner>/<repo>/milestones
+          MILESTONE_NUMBER: '1'
+        with:
+          script: |
+            const milestoneNumber = parseInt(process.env.MILESTONE_NUMBER, 10);
+
+            // Works for both issues and pull_request events
+            const issueNumber =
+              context.payload.issue?.number ??
+              context.payload.pull_request?.number;
+
+            if (!issueNumber) {
+              core.setFailed('Could not determine issue/PR number from event payload.');
+              return;
+            }
+
+            await github.rest.issues.update({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: issueNumber,
+              milestone: milestoneNumber,
+            });
+
+            core.info(`Assigned #${issueNumber} to milestone ${milestoneNumber}.`);