docs: Hardware and OS Compatibility Table

[imtuyethan]

Specs

Add engine compatibility table to "Cortex Docs > Installation".

The goal is:
Given user has:
Architecture X, Hardware accelerator Y, OS Z -> Which engines can they use
Given cortex dev works in javascript, which one can they use

https://www.notion.so/jan-ai/Engine-Compatibility-Table-34277e4066ac44aabc3e54e36985ab32?pvs=4

Discord discussion

https://discord.com/channels/1107178041848909847/1257871973225201715

Design

Excalidraw from @hiro-v: https://link.excalidraw.com/l/571tiQ8ZjDE/6RWZ23LCKRF
UI from @imtuyethan: https://www.figma.com/design/WPcuxh4ngogYSwBvs8CTRF/Cortex-Website?node-id=988-13937&t=qJ6HXGfQ8Tpx5pg7-4

Reference for this would be

https://onnxruntime.ai/getting-started
https://pytorch.org/get-started/locally/ (more users)

[dan-homebrew]

I am renaming this issue, to reflect the content more clearly

@urmauur I recall seeing a PR to Docs that had this - do you mind linking the PR?