ci: onboard agreements (#10)

Author: artemrys

.github/workflows/agreements.yaml

@@ -0,0 +1,18 @@
+name: "CLA Assistant"
+on:
+  issue_comment:
+    types: [created]
+  pull_request_target:
+    types: [opened, closed, synchronize]
+
+jobs:
+  call-workflow-agreements:
+    uses: splunk/addonfactory-github-workflows/.github/workflows/reusable-agreements.yaml@v1
+    permissions:
+      actions: read
+      contents: read
+      pull-requests: write
+      statuses: read
+    secrets:
+      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      PERSONAL_ACCESS_TOKEN: ${{ secrets.PAT_CLATOOL }}