【Refactor】folder structure and .mdc rulers added

### Duplicates

- [x] I have searched the existing issues

### Summary 💡

Compared to project [here](https://github.com/tw-haiven/haiven), refactor project strcture and record into new .mdc ruler files

### Examples 🌈

https://github.com/tw-haiven/haiven

### Motivation 🔦

Regarded as a template for other AI-driven project

### Feature category

Other: codebase refactor