Replace deleted_files with manifest-based updater cleanup, add release workflow

- Add manifest.json generation script (scripts/generate-manifest.php)
- Add Updater::cleanStaleFiles() that removes files not in manifest
- Add /api/v1/update/clean endpoint with backward compatibility
- Add configurable update_protected_paths in config/invoiceshelf.php
- Update frontend to use clean step instead of delete step
- Add GitHub Actions release workflow triggered on version tags
- Add .github/release.yml for auto-generated changelog categories
- Update Makefile to include manifest generation and scripts directory

resources/scripts-v2/api/services/update.service.ts

@@ -62,6 +62,11 @@ export const updateService = {
     return data
   },
 
+  async clean(payload?: { deleted_files?: string | string[] | null }): Promise<UpdateStepResponse> {
+    const { data } = await client.post(API.UPDATE_CLEAN, payload ?? {})
+    return data
+  },
+
   async migrate(): Promise<UpdateStepResponse> {
     const { data } = await client.post(API.UPDATE_MIGRATE)
     return data