feat: add engine install cli

[namchuai]

Describe Your Changes

• Add engine install with hardware detection.

Screenshots

Engine init cortex.llamacpp on windows. For this machine, AMD Ryzen 5950x, it choose AVX2, cuda version 12.0

Engine init cortex.onnx

Engine init cortex.tensorrt-llm

Self Checklist

• Added relevant comments, esp in complex areas
• Updated docs (for bug fixes / features)
• Created issues for follow-up changes or refactoring needed

[vansangpfiev]

I think we should change from init to install
The command will be something like:

cortex engines tensorrt-llm install

[namchuai]

I think we should change from init to install The command will be something like:

cortex engines tensorrt-llm install

Hmm, this will need to change a little bit because it goes against the design of cli application. Might have to add multiple subcommand though.