Add automated release job (#3)

Create a new release daily as a heartbeat monitor for downstream syncs
and automations.

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TODO:

- [ ] Write new tests or update the old ones to cover new functionality.
- [ ] Update doc-strings where appropriate.
- [ ] Update or write new documentation in `packit/packit.dev`.
- [ ] ‹fill in›

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Fixes

Related to

Merge before/after

<!-- release notes footer -->

RELEASE NOTES BEGIN

Packit now supports automatic ordering of ☕ after all checks pass.

RELEASE NOTES END

Author: ckelleyRH

.github/workflows/daily-release.yml

@@ -0,0 +1,37 @@
+name: Daily Release
+# Release a new version daily as a heartbeat for downstream automation.
+
+on:
+  schedule:
+    # Run every day at 23:00 UTC
+    - cron: '0 23 * * *'
+  workflow_dispatch:  # Allow manual trigger for testing
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write  # Required to create releases
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Get next version
+        id: version
+        run: |
+          git fetch --tags
+          LATEST=$(git tag -l '0.*' 'v0.*' 2>/dev/null | sed 's/^v//' | sort -V | tail -n 1)
+          PATCH=$(echo "$LATEST" | cut -d. -f3)
+          NEW_PATCH=$((PATCH + 1))
+          MAJOR=$(echo "$LATEST" | cut -d. -f1)
+          MINOR=$(echo "$LATEST" | cut -d. -f2)
+          echo "version=${MAJOR}.${MINOR}.${NEW_PATCH}" >> $GITHUB_OUTPUT
+
+      - name: Create Release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          gh release create ${{ steps.version.outputs.version }} \
+            --title "Daily Release ${{ steps.version.outputs.version }}" \
+            --generate-notes