feat: add init and upload in kernel-builder cli

[drbh]

This PR is a WIP to add the init command to the kernel-builder rust cli. This branch mainly ports the init command from the python cli, with some improvements to the interface and updates to the template

This PR adds an the init and upload command to the rust kernel-builder cli similar to implementation in the current python cli. It also adds a build command that is a facade for the nix run so devs can interact with a single tool for the full creation lifecycle of a kernel.

Mainly it aims to have better defaults to make the commands easier to use

1. the init command only requires the name of the kernels (folder) and the owner is pulled via a whoami request if the user is already logged into hf
2. the init command creates a new dir if a name is specified, if called within a dir, the cli will use the dir name as the kernel name
3. the upload command does not require a repo id if the id can be read from the build
4. the upload command does not require a path to the build folder and will default to looking for the build dir if no explicit path is specified

example usage

init from inside of a existing dir

mkdir some-kernel
cd some-kernel
kernel-builder init
# Downloading template from kernels-community/template...
# Initialized `drbh/some-kernelt` at /home/drbh/Projects/kernels/kernel-builder/some-kernel

init from outside of a dir

kernel-builder init some-kernel
# Downloading template from kernels-community/template...
# Initialized `drbh/some-kernelt` at /home/drbh/Projects/kernels/kernel-builder/some-kernel

build

kernel-builder build
# ...
# some-kernel-torch-ext> no Makefile or custom installCheckPhase, doing nothing
# some-kernel-torch-ext> Checking of ABI compatibility
# some-kernel-torch-ext> 🐍 Checking for compatibility with manylinux_2_28 and Python ABI version 3.9
# some-kernel-torch-ext> ✅ No compatibility issues found
# some-kernel-torch-ext> Checking loading kernel with get_kernel
# some-kernel-torch-ext> Check whether the kernel can be loaded with get-kernel: some_kernel
# some-kernel-torch-ext> Running phase: removeBytecodeHook
# some-kernel-torch-ext> Removing Python bytecode

upload

kernel-builder upload
# Found 7 build variant(s) in /home/drbh/Projects/kernels/kernel-builder/some-kernel/build
# Using branch `v1` (new)
# Uploading 36 operations...
# Kernel upload successful. Find the kernel at: https://hf.co/drbh/some-kernel