move require to llrt_modules

[ahaoboy]

llrt require is implemented in the llrt_core module

If it can be implemented in llrt_modules, it will make it easier for other rquickjs projects to use cjs modules.

use llrt_modules::{ require::{init}};

init(ctx)

require('fs')

[nabetti1720]

It's a bit chaotic in vm::init() and could be a bit more organized. :)

• related number -> llrt_number (new)
• related json -> llrt_json (additional)
• related require -> llrt_require (new)

[ahaoboy]

simd_json is also a great feature. If it can be moved into llrt_modules, more projects can benefit from it.

[Sytten]

Dont know if you saw @ahaoboy but I refactored the modules into individual ones, simd_json is already in llrt_json