chore: set up angular-robot for repo (#10840)

.github/angular-robot.yaml

@@ -0,0 +1,62 @@
+# Configuration for angular-robot
+
+# options for the merge plugin
+merge:
+  # the status will be added to your pull requests
+  status:
+    # set to true to disable
+    disabled: false
+    # the name of the status
+    context: "ci/angular: merge status"
+    # text to show when all checks pass
+    successText: "All checks passed!"
+    # text to show when some checks are failing
+    failureText: "The following checks are failing:"
+
+  # the g3 status will be added to your pull requests if they include files that match the patterns
+  g3Status:
+    # set to true to disable
+    disabled: true
+
+  # comment that will be added to a PR when there is a conflict, leave empty or set to false to disable
+  mergeConflictComment: "Hi @{{PRAuthor}}! This PR has merge conflicts due to recent upstream merges.
+\nPlease help to unblock it by resolving these conflicts. Thanks!"
+
+  # label to monitor
+  mergeLabel: "pr: merge ready"
+
+  # list of checks that will determine if the merge label can be added
+  checks:
+    # whether the PR shouldn't have a conflict with the base branch
+    noConflict: true
+    # list of labels that a PR needs to have, checked with a regexp (e.g. "PR target:" will work for the label "PR target: master")
+    requiredLabels:
+      - "release: *"
+      - "cla: yes"
+
+    # list of labels that a PR shouldn't have, checked after the required labels with a regexp
+    forbiddenLabels:
+      - "blocked"
+      - "pr: blocked"
+      - "pr: needs*"
+      - "presubmit failures"
+      - "cla: no"
+
+    # list of PR statuses that need to be successful
+    requiredStatuses:
+      - "continuous-integration/travis-ci/pr"
+      - "ci/circleci: build"
+
+  # the comment that will be added when the merge label is added despite failing checks, leave empty or set to false to disable
+  # {{MERGE_LABEL}} will be replaced by the value of the mergeLabel option
+  # {{PLACEHOLDER}} will be replaced by the list of failing checks
+  mergeRemovedComment: "I see that you just added the `{{MERGE_LABEL}}` label, but the following checks are still failing:
+\n{{PLACEHOLDER}}
+\n
+\n**If you want your PR to be merged, it has to pass all the CI checks.**
+\n
+\nIf you can't get the PR to a green state due to flakes or broken master, please try rebasing to master and/or restarting the CI job. If that fails and you believe that the issue is not due to your change, please contact the caretaker and ask for help."
+
+# options for the triage plugin
+triage:
+  disabled: true