Move Solidity and Cairo packages into subfolders

[ericglau]

Moves the folders with code generation logic into separately named subfolders under core, to allow for expansion with additional languages/frameworks going forward.

packages/core -> packages/core/solidity
packages/core-cairo -> packages/core/cairo

Reorganizes UI folders to be as follows:

ui/src/solidity
ui/src/cairo
ui/src/common
ui/src (top level files only)

[socket-security]

New and removed dependencies detected. Learn more about Socket for GitHub ↗︎

Package	New capabilities	Transitives	Size	Publisher
npm/[email protected]	None	0	22.7 MB	typescript-bot

🚮 Removed packages: npm/@openzeppelin/[email protected]

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[ernestognw]

Looks good but it's the kind of PR that might be missing something given its size.
I see everything is passing so it should be fine.