✨ Add web extension support

[misode]

Todo

• Fix failing fetch due to cors (probably easiest to wait for Proxy for api.github.com #1480)
• Use vsc.workspace.fs instead of externals.fs for project files (maybe wait for ♻️ Use LSP based file watcher #1610)
• De-duplicate a lot of code between extension/server and extension-web/server-web.

[MulverineX]

[Error - 12:52:16 PM] [Project] [callInitializers] [1] “nD” Error: ENOENT: no such file or directory, scandir 'C:\Users\mulve\AppData\Local\Programs\Microsoft VS Code\vscode-vfs:\github\MulverineX\player_motion'
    at async readdir (node:internal/fs/promises:950:18)
    at async V (c:\Users\mulve\.vscode\extensions\spgoding.datapack-language-server-4.5.15\dist\server.js:68:1937)
    at async u (c:\Users\mulve\.vscode\extensions\spgoding.datapack-language-server-4.5.15\dist\server.js:128:14762)
    at async Promise.all (index 1)
    at async nD (c:\Users\mulve\.vscode\extensions\spgoding.datapack-language-server-4.5.15\dist\server.js:128:15042)
    at async Promise.allSettled (index 1)
    at async t (c:\Users\mulve\.vscode\extensions\spgoding.datapack-language-server-4.5.15\dist\server.js:69:8904)
    at async r (c:\Users\mulve\.vscode\extensions\spgoding.datapack-language-server-4.5.15\dist\server.js:69:9397) {
  errno: -4058,
  code: 'ENOENT',
  syscall: 'scandir',
  path: 'C:\\Users\\mulve\\AppData\\Local\\Programs\\Microsoft VS Code\\vscode-vfs:\\github\\MulverineX\\player_motion'
}

Wondering if this is directly related or if it should get its own Issue/PR @misode

This is when using the Remote Repositories feature of vscode