Implements the release workflow

.github/workflows/release.yaml

@@ -0,0 +1,40 @@
+# This workflow creates and updates a git tag named "latest".
+# When a new tag with the name matching "Ubuntu*" is pushed to the repository,
+# the "latest" tag is updated to the same commit as the newly pushed tag and
+# a new GitHub Release is created as draft, pointing to the "latest" tag.
+# The commits added between the previous "latest" and the current one are
+# listed in an automatic changelog. Besides the source code, the latest PDB
+# archives generated by the previous runs of the "build-wsl" workflow are
+# uploaded as release assets.
+#
+# One human being must then edit the draft release to:
+# - Change the release tag from "latest" to the originally pushed "Ubuntu*" tag
+# - Clean up the changelog, if required,
+# - Upload more assets, maybe?
+# - Human things,
+# - And then publish the release.
+#
+# It's important to make sure that the tag points to the exact same commit that
+# generated the last app submited to the store.
+
+name: Draft a new release
+on:
+  push:
+    tags:
+      - "Ubuntu*" # Preserving the existing naming convention.
+
+jobs:
+  on_tag:
+    name: Prepare a release draft
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout wiki # The PDB archives are stored inside the wiki.
+        uses: actions/checkout@v3
+        with:
+          repository: ubuntu/wsl.wiki
+      - uses: "marvinpinto/actions-automatic-releases@v1.2.1"
+        with:
+          repo_token: ${{ secrets.GITHUB_TOKEN }}
+          draft: true
+          automatic_release_tag: latest
+          files: debug-databases/debug-database-*.tar.zst