Set up CLA process and remove DCO (#129)

Signed-off-by: Ilan Bigio <ilan@openai.com>

.github/workflows/cla.yml

@@ -0,0 +1,29 @@
+name: CLA Assistant
+on:
+  issue_comment:
+    types: [created]
+  pull_request_target:
+    types: [opened, closed, synchronize]
+
+permissions:
+  actions: write
+  contents: write
+  pull-requests: write
+  statuses: write
+
+jobs:
+  cla:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: contributor-assistant/github-action@v2.6.1
+        if: |
+          github.event_name == 'pull_request_target' ||
+          github.event.comment.body == 'recheck' ||
+          github.event.comment.body == 'I have read the CLA Document and I hereby sign the CLA'
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          path-to-document: docs/CLA.md
+          path-to-signatures: signatures/cla.json
+          branch: cla-signatures
+          allowlist: dependabot[bot]

.github/workflows/dco.yml

@@ -1,43 +0,0 @@
-name: dco
-on: [pull_request]
-
-jobs:
-  check:
-    runs-on: ubuntu-latest
-    permissions:
-      contents: read # minimum needed
-
-    steps:
-      - uses: actions/checkout@v4
-        with: { fetch-depth: 0 } # make sure base SHA exists
-
-      - name: Verify Signed‑off‑by lines
-        shell: bash
-        run: |
-          base="${{ github.event.pull_request.base.sha }}"
-          head="${{ github.event.pull_request.head.sha }}"
-
-          unsigned=$(git log --format='%h %s' "$base..$head" | while read sha _; do
-            git show -s --format='%B' "$sha" | grep -qi '^Signed-off-by:' || echo "$sha"
-          done)
-
-          if [ -n "$unsigned" ]; then
-            echo "::error ::❌  DCO check failed."
-            echo ""
-            echo "Commits missing the 'Signed-off-by:' footer:"
-            echo "$unsigned"
-            echo ""
-            echo "🛠 **Quick fix (make ONE signed commit):**"
-            echo "    git fetch origin"
-            echo "    git reset --soft origin/${GITHUB_BASE_REF}"
-            echo "    git commit -s -m \"<your message>\""
-            echo "    git push --force-with-lease"
-            echo ""
-            echo "🔧 **Fix individual commits:**"
-            echo "    git rebase -i origin/${GITHUB_BASE_REF} --exec \"git commit --amend -s --no-edit\""
-            echo "    git push --force-with-lease"
-            echo ""
-            echo "💡  Or edit the commit message in GitHub UI and add:"
-            echo "    Signed-off-by: Your Name <email@example.com>"
-            exit 1
-          fi