chore: add auto-assign issues workflow

Author: FreekHeijting

.github/workflows/auto-assign-issues.yml

@@ -0,0 +1,19 @@
+name: Auto-assign issues to product owner
+on:
+  issues:
+    types: [opened]
+jobs:
+  assign:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+      - uses: actions/github-script@v7
+        with:
+          script: |
+            await github.rest.issues.addAssignees({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+              assignees: ['FreekHeijting']
+            });