GHA: add copy-labels, cleanup PR template

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,19 +1 @@
-## Description
-
-<!--
-  Add a detailed description for the changes made in this pull request
-
-  If your PR addresses an existing issue, add it here.
-  Use the template string - `This pull request resolves #<issue-number>`
--->
-
-## Type of Change
-
-<!-- Mark with an `x` all the checkboxes that apply (like `[x]`) -->
-
--   [ ] 📚 Documentation (Non-breaking change; Changes in the documentation)
--   [ ] 🔧 Bug fix (Non-breaking change; Fixes an existing bug)
--   [ ] 🥂 Improvement (Non-breaking change; Improves existing feature)
--   [ ] 🚀 New feature (Non-breaking change; Adds functionality)
--   [ ] 🔐 Security fix (Non-breaking change; Patches a security issue)
--   [ ] 💥 Breaking change (Breaks existing functionality)
+### Description

.github/workflows/copy-issue-labels.yml

@@ -0,0 +1,20 @@
+name: Copy issue labels to PR
+on:
+  workflow_dispatch:
+  pull_request:
+    types: [opened]
+# Note: this may be obsolete when it is included here: https://github.com/microsoft/vscode-pull-request-github/issues/1186
+jobs:
+  copy-labels:
+    runs-on: ubuntu-latest
+    name: Copy labels from linked issues
+    permissions:
+      contents: write
+      issues: write
+      pull-requests: write
+
+    steps:
+      - name: copy-labels
+        uses: michalvankodev/copy-issue-labels@v1.3.0
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}