Remodel type definitions

[JCWasmx86]

https://github.com/JCWasmx86/mesonlsp/tree/main/src/libtypenamespace is not scalable. Replace it by a better and more extensible model with less duplication

[JCWasmx86]

We could hook into mesonbuilds @typed_pos_(kw)args and generate the definitions from it