Create overal code structure

[taijusanagi]

Descritption

• This should be done after Metamask snap
• This creates snap, contract, backend, and bundler in a structured way
• This creates docs, and an investigation directory too.

[taijusanagi]

Backend is setup with this tutorial https://blog.logrocket.com/how-to-set-up-node-typescript-express/

[taijusanagi]

• Snap can use Metamask Snap Truffle Box
• Contract can use Metamask Snap Truffle Box
• Bundler can use Infinitism implementation

So no need to have an investigation dir, I'll directly code in those.

[taijusanagi]

Ports

• Bundler: 3000
• Frontend: 8000
• Backend: 8080