feat(parser): implement parse_cast_type function and organize module structure

[Bappoz]

This pull request refactors the implementation of the parse_cast_type function in the parser. The main change is moving the function from the expressions::prefix module to a new types module, which improves code organization and separation of concerns. There are no changes to the logic of the function itself.

Parser code organization:

• Moved the parse_cast_type function from src/parser/rules/expressions/prefix.rs to a new module, src/parser/rules/types.rs, to better separate type parsing logic from expression parsing. [1] [2] [3] [4]
• Added the new types module to the parser rules by updating src/parser/rules/mod.rs.

[guxvr]

boa