ci: add GitHub workflow for automated releases and Docker builds

Add a new workflow that automatically builds and pushes Docker images to GHCR when version tags are pushed. Also creates GitHub releases with changelogs. The workflow includes:
- Docker image building with caching
- Automatic version detection
- Changelog generation from git history
- Release creation with proper version tagging

Author: chiqors

.github/wokflows/release.yml .github/workflows/release.yml.github/wokflows/release.yml renamed to .github/workflows/release.yml

@@ -4,6 +4,8 @@ on:
   # Only trigger on version tags (semantic versioning)
   push:
     tags: [ 'v*.*.*' ]
+  # Allow manual runs from the GitHub UI
+  workflow_dispatch:
 
 # This job builds and pushes the Docker image to GHCR
 jobs:
@@ -127,4 +129,4 @@ jobs:
           body: ${{ steps.release_notes.outputs.release_body }}
           draft: false
           prerelease: ${{ steps.release_notes.outputs.is_prerelease }}
-          token: ${{ secrets.GITHUB_TOKEN }}
+          token: ${{ secrets.GITHUB_TOKEN }}