fix: Replace Handlebars-Generated Types with Rust-Generated TypeScript Types

[c12i]

Currently, TypeScript types are generated using Handlebars templates, resulting in a poorly formatted and less maintainable types.ts file. This issue aims to replace the Handlebars-generated TypeScript types with types generated programmatically in Rust. This change will improve maintainability and ensure type definitions are directly derived from Rust structs and enums.

Problems with Handlebars-Generated Types:

• Inconsistent formatting and indentation
• Difficult to maintain and update
• Prone to template errors and inconsistencies