Coordinates multi-file TypeScript code generation with full cross-file deduplication.

Each piece of generated code lives in exactly one file:

• ash_types.ts — type aliases, resource schemas, filter types, utility types, custom imports,

                channel payload type aliases and events maps

• ash_zod.ts — ALL Zod schemas: resource-level + per-action RPC + per-route controller
• ash_rpc.ts — imports types from ash_types.ts (no Zod), hook types, helper functions,

              per-action input types, per-action result types, per-action RPC functions

• routes.ts — imports types from ash_types.ts (no Zod), static code, per-route path

             helpers, per-route input types, per-route action functions

• ash_typed_channels.ts — imports types from ash_types.ts, channel subscription helper functions
• namespace/*.ts — re-exports: functions + types from ash_rpc.ts, Zod schemas from ash_zod.ts

Returns a map of %{file_path => content} for all generated files.