ci: Auto add milestone/project to Renovate PRs

Author: alessfg

.github/workflows/milestone.yml

@@ -0,0 +1,43 @@
+---
+name: Add milestone and project to GitHub PR
+on:
+  pull_request:
+    branches: [main]
+  workflow_dispatch:
+permissions: read-all
+jobs:
+  milestone:
+    name: Add milestone to GitHub PR
+    if: github.actor == 'renovate[bot]'
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Find current milestone and add it to GitHub PR
+        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
+        with:
+          script: |
+            try {
+              const { data: [milestones] } = await github.issues.listMilestones({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+              });
+
+              await github.issues.update({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: context.issue.number,
+                milestone: milestone.number,
+              });
+            } catch (error) {
+              core.setFailed(`Action failed with error ${error}`);
+            }
+
+  project:
+    name: Add project to GitHub PR
+    if: github.actor == 'renovate[bot]'
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Add Project
+        uses: actions/add-to-project@244f685bbc3b7adfa8466e08b698b5577571133e # v.1.0.2
+        with:
+          project-url: https://github.com/orgs/nginxinc/projects/17/views/1
+          github-token: ${{ secrets.ADD_TO_PROJECT_TOKEN }}

CHANGELOG.md

@@ -41,6 +41,7 @@ CI/CD:
 - Remove platform metadata from the Ansible Galaxy role metadata since platforms are no longer supported in Ansible Galaxy NG.
 - Implement OSSF Scorecard.
 - Implement Renovate Bot.
+- Automatically add milestone and project to Renovate Bot PRs.
 
 ## 0.24.3 (July 11, 2024)