Add .github/workflows/cla.yml through file_replicator. (#162)

.github/workflows/cla.yml

@@ -0,0 +1,25 @@
+name: "CLA Assistant"
+on:
+  issue_comment:
+    types: [created]
+  pull_request_target:
+    types: [opened,closed,synchronize]
+
+jobs:
+  CLAssistant:
+    runs-on: ubuntu-latest
+    steps:
+      - name: "CLA Assistant"
+        if: (github.event.comment.body == 'recheck' || github.event.comment.body == 'I have read the CLA Document and I hereby sign the CLA') || github.event_name == 'pull_request_target'
+        # Alpha Release
+        uses: cla-assistant/[email protected]
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          PERSONAL_ACCESS_TOKEN : ${{ secrets.CLA_PAT }}
+        with:
+          remote-organization-name: twitter
+          remote-repository-name: .github-private
+          path-to-signatures: 'cla/signatures.json'
+          path-to-document: 'https://gist.github.com/twitter-service/a1ad5818c024dc4265f8b60e6d043f26'
+          custom-allsigned-prcomment: 'All Contributors have signed the CLA. If the commit check is not passing, a maintainer must go the Checks tab of this PR and rerun the GitHub Action.'
+          branch: 'main'