Fix code quality violations and exclude Manifest from checks

Document application modes (development/debug/production)
Add global file drop handler, order column normalization, SPA hash fix
Serve CDN assets via /_vendor/ URLs instead of merging into bundles
Add production minification with license preservation
Improve JSON formatting for debugging and production optimization
Add CDN asset caching with CSS URL inlining for production builds
Add three-mode system (development, debug, production)
Update Manifest CLAUDE.md to reflect helper class architecture
Refactor Manifest.php into helper classes for better organization
Pre-manifest-refactor checkpoint: Add app_mode documentation

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Co-Authored-By: Claude <noreply@anthropic.com>

node_modules/postcss-minify-font-values/README.md

@@ -52,13 +52,15 @@ Pass `false` to disable the module from removing duplicated font families.
 
 ##### removeQuotes
 
-Type: `boolean`
+Type: `boolean` | `(prop: string) => '' | 'font' | 'font-family' | 'font-weight'`
 Default: `true`
 
 Pass `false` to disable the module from removing quotes from font families.
 Note that oftentimes, this is a *safe optimisation* & is done safely. For more
 details, see [Mathias Bynens' article][mathias].
 
+Pass a function to determine whether a css variable is one of `font`, `font-family`, and `font-weight` to determine whether the variable needs to remove quotes.
+
 ## Usage
 
 ```js