[GH] Add review expectations comment

Author: kodster28

.github/workflows/pr-expectations.yml

@@ -0,0 +1,27 @@
+name: Set review expectations
+
+# **What it does**: Adds a comment to newly created PRs.
+# **Why we have it**: Sets an expectation internally and externally for how fast we should be getting to something. Reduces questions internally.
+# **Who does it impact**: Cloudflare contributors / external contributors
+
+on:
+  pull_request_target:
+    types:
+      - opened
+
+jobs:
+  review_comment:
+    name: Add review comment
+    runs-on: ubuntu-latest
+    steps:
+      - id: check_if_contributor_is_external
+        name: Check if contributor is external
+        run: 'curl --write-out ''%{http_code}'' --silent --output /dev/null -L -H "Accept: application/vnd.github+json" -H "Authorization: Bearer ${{ env.GH_TOKEN }}" -H "X-GitHub-Api-Version: 2022-11-28" https://api.github.com/orgs/cloudflare/members/${{ github.event.pull_request.user.login }} | grep -q ''204'' && echo "is_external=false" >> $GITHUB_OUTPUT || echo "is_external=true" >> $GITHUB_OUTPUT'
+        env:
+          GH_TOKEN: ${{ secrets.HOLOPIN_LABELER }}
+      - name: External comment
+        run: gh pr comment "$NUMBER" --body "Howdy and thanks for contributing to our repo.\n\nWe generally get around to reviewing new, external PRs within **2 weeks**.\n\nIf it's been longer than then without any movement, try tagging the **Assignees** in a comment."
+        if: steps.check_if_contributor_is_external.outputs.is_external == 'true'
+      - name: External comment
+        run: gh pr comment "$NUMBER" --body "Howdy and thanks for contributing to our repo.\n\nWe generally get around to reviewing internal PRs with **1 week**. If it's something urgent or has been sitting without any movement for more than that, start a thread in the `Developer Docs` space internally."
+        if: steps.check_if_contributor_is_external.outputs.is_external == 'false'