GitLab

- Implement core modules: Linear, Embedding, RMSNorm
- Add PyTorch-like macros for module and parameter definition
  - INFINICORE_NN_MODULE for single module declaration
  - INFINICORE_NN_MODULE_VEC for module vectors
  - INFINICORE_NN_PARAMETER for parameter declaration
  - Corresponding INIT macros for initialization
- Implement hierarchical module system with dynamic path generation
- Add state_dict() and load_state_dict() support
- Refactor module design: protected registration methods, removed path_ member
- Add comprehensive test suite including TinyLlama integration
- All parameters are protected with public accessors

Co-authored-by: Jiacheng Huang <huangjiacheng0709@outlook.com>
Co-authored-by: wooway777 <wooway777@gmail.com>