Add new command and re-structure project

[Aisuko]

(.venv) @Aisuko ➜ /workspaces/kimchima (fix/structure) $ /workspaces/kimchima/.venv/bin/python /workspaces/kimchima/examples/examples.py
torch.Size([1, 384])
torch.Size([2, 384])
Devices.CPU
(0, 0)
(.venv) @Aisuko ➜ /workspaces/kimchima (fix/structure) $ python
Python 3.12.2 (main, Feb 13 2024, 09:38:19) [GCC 10.2.1 20210110] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import kimchima
>>> from kimchima import get_device
>>> get_device()
<Devices.CPU: 'cpu'>
>>> exit()
(.venv) @Aisuko ➜ /workspaces/kimchima (fix/structure) $