Onboard to Release Drafter

To give us a more consistent set of release notes, especially now we're
using multi-repo setup, we can use it to build our upcoming release's
changelog with a centrally configured + managed configuration.

.github/release-drafter.yml

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+_extends: .github

.github/workflows/release-drafter.yml

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+name: Release Drafter
+
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch: {}
+
+permissions:
+  contents: read
+
+jobs:
+  update_release_draft:
+    permissions:
+      contents: write
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: release-drafter/release-drafter@v5
+        with:
+          name: next
+          tag: next
+          version: next
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}