feat: add include support to IDL v2

[m62624]

No description provided.

[gemini-code-assist]

Code Review

This pull request introduces support for type aliases and !@include directives in the IDL, which is a great feature enhancement. The changes are comprehensive, touching the parser, AST, client generator, and templates to accommodate these new features. A new preprocessor is also added to handle the include logic. The implementation is solid, but I've identified a bug in the client code generator that results in a trailing comma in generic type parameter lists. I've also noted a potential robustness issue in the preprocessor's logic for detecting top-level scope, which could be improved for future maintainability. Overall, great work on this feature.

[m62624]

/gemini review

[gemini-code-assist]

Code Review

This pull request introduces an IDL preprocessor in sails-idl-parser-v2 to support !@include directives, enabling modular IDL definitions and preventing duplicate inclusions through content hashing. The client-gen crate has been updated to utilize this new preprocessor. Feedback suggests refining the brace_level handling in the preprocessor for better syntax error management and improving the test IdlLoader implementation to use content hashing for more robust uniqueness checks and path resolution.