Maintain consistent style

Maintain consistent style patterns throughout the codebase to improve readability, reduce maintenance overhead, and prevent errors. Key areas to focus on:

1. Use consistent struct declarations: For top-level structs, prefer:

   const Installer = @This();
   

   instead of:

   pub const Installer = struct {
   

2. Eliminate redundancies: Remove duplicate declarations such as repeated flags, option definitions, or multiple type declarations.

   // Bad - duplicates in options list
   GLOBAL_OPTIONS[LONG_OPTIONS]="--extension-order --jsx-factory --jsx-fragment --extension-order --jsx-factory --jsx-fragment"
      
   // Good - no duplicates
   GLOBAL_OPTIONS[LONG_OPTIONS]="--extension-order --jsx-factory --jsx-fragment"
   

3. Maintain consistent formatting: Ensure proper spacing, consistent namespace qualifiers, and appropriate control structures.

   // Bad - inconsistent namespace qualification
   if (comptime Environment.debug_checks) {
      
   // Good - consistent qualification
   if (comptime bun.Environment.debug_checks) {
   

4. Use appropriate control structures: Choose the most readable structure for the logic being expressed.

   // Consider switch statements for multiple conditions
   fn isValidRedirectStatus(status: u16) bool {
       return switch (status) {
           301, 302, 303, 307, 308 => true,
           else => false,
       };
   }
   

Consistent style makes code easier to read, review, and maintain for the entire team.