Implement Caching for Asset Minification

This PR introduces a caching mechanism for asset minification, allowing the system to store and reuse minified files without reprocessing unchanged assets. **Changes Made** - Stores minified asset paths in a cache file (storage/framework/cache/minify.php). - Checks if the minified file exists and is up-to-date before regenerating it. - Serves the cached minified file when available or falls back to the minify.assets route if not. - Throws an exception when the original asset file is not found. **Benefits** - Improved Performance: Reduces redundant processing for unchanged assets. - Lower Server Load: Avoids unnecessary minification operations. The cached file will be served with random string file name after minification.