[feat] Implement vfs library for file system management

[Kitenite]

Describe the feature

Currently, we are using a map of files and content in editorEngine.sandbox in order to keep an in-memory version of our remote sandbox. We should use an actual virtual file system in order to correctly simulate file system in memory. It will reduce complexity and improve performance.

https://github.com/jvilk/BrowserFS https://github.com/zen-fs https://github.com/streamich/memfs https://github.com/isomorphic-git/lightning-fs

[irfanfaraaz]

Working on it