Torchrua

Have almost all the functions rewritten, unifying them into a more user-friendly interface design in Rust style.

Features

- Rewrite core functions by introducing `major_sizes_to_ptr`
- Add indexing functions for `CattedSequence`
- Refactor `CattedSequence` to be a `NamedTuple`
- Add `unique_catted_sequence` and `unique_packed_sequence`
- Add `repeat_interleave_catted_sequence` and `repeat_interleave_packed_sequence`

Features

- Support scatter operations

Features

- Add `CattedSequence`

Features

- Rewrite core functions to obtain higher and more elegant index construction performance.
- Most interfaces are kept unchanged, while these core functions are updated.