chore(ci): clean up CI/CD - remove redundant workflows, fix Node versions, add auto-merge, enable branch protection

Author: Smartdevs17

.github/workflows/auto-merge.yml

@@ -0,0 +1,62 @@
+name: Auto-Merge CI-Passing PRs
+
+on:
+  pull_request_target:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  auto-merge:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Enable auto-merge for PRs
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const pr = context.payload.pull_request;
+
+            // Don't auto-merge draft PRs
+            if (pr.draft) {
+              console.log('PR is draft, skipping auto-merge');
+              return;
+            }
+
+            // Don't auto-merge if PR is from the owner (manual merges for maintainers)
+            if (pr.user.login === context.repo.owner) {
+              console.log('PR is from repo owner, skipping auto-merge');
+              return;
+            }
+
+            try {
+              await github.rest.pulls.merge({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                pull_number: pr.number,
+                merge_method: 'squash'
+              });
+              console.log(`PR #${pr.number} merged successfully`);
+            } catch (error) {
+              // If merge fails (conflicts, checks not passing), enable auto-merge
+              if (error.status === 405 || error.status === 422) {
+                try {
+                  await github.graphql(`
+                    mutation ($id: ID!, $method: PullRequestMergeMethod!) {
+                      enablePullRequestAutoMerge(input: { pullRequestId: $id, mergeMethod: $method }) {
+                        pullRequest { number }
+                      }
+                    }
+                  `, {
+                    id: pr.node_id,
+                    method: 'SQUASH'
+                  });
+                  console.log(`Auto-merge enabled for PR #${pr.number}`);
+                } catch (graphqlError) {
+                  console.log(`Could not enable auto-merge: ${graphqlError.message}`);
+                }
+              } else {
+                console.log(`Unexpected error: ${error.message}`);
+              }
+            }