* [feat]: update kt-kernel hooks and add contribution guide
* [docs]: add contributing guide
* [style]: format the python file and cpp file in kt-kernel
* update README for kt-kernel
* style: format C++ and Python code in kt-kernel
- Format C++ files: task_queue, ext_bindings, and MoE operators
- Format Python utility modules: amx, llamafile, and loader
- Improve code readability and consistency