Minimize diff

[abentkamp]

See diff in this PR: hhu-adam/monaco-lean4#1

Overview of diff:

• Set language ID to lean first and then to lean4?
• [webview/index.ts] Loading scripts was easier using imports, but might be possible using the loader as well

Addressed:

• [leanclient.ts] collectAllOpenLeanDocumentUris does not work as expected
• [projectInfo.ts] findLeanProjectRootInfo requires filesystem
• [clientProvider.ts] Checks require file system (e.g. checkIsLeanVersionUpToDate)
• [vscode.css] Stylesheet variables are provided to VSCode webviews automatically. We need to inject it into the iframe by hand.
• [webview/index.ts] Communication works differently in IFrame
• [leanclient.ts] Use Monaco Language Client instead of VSCode Language Client
  • serverProcess does not exist (question mark solution seems ok)
  • RFC: do not use _serverProcess in leanclient. leanprover/vscode-lean4#487
  • document selector does not work as expected ("lean4" string should work for both)
• [infoview.ts] WebviewPanel in gets replaced by HTMLIFrameElement
  • InfoProvider gets setInfoviewElement function to supply location of infoview
• [batch.ts/fsHelper.ts] spawn/promises cannot be imported: ambiguous indirect export: using memfs now
• Vite fails to load abbreviations.json properly (Fixed: 1ce695c)
• [infoview.ts] Editor.selection for some reason uses _character instead of character. (Fixed: hhu-adam/monaco-lean4@40fa306)
  • fix: do not implicitely cast Position to ls.Position. leanprover/vscode-lean4#486
• [taskgutter.ts] Adjust image paths (Fixed: hhu-adam/monaco-lean4@2a01c47)
• [logger.ts] Console object seems to work differently
  • What I did now is to implement our own Console in hhu-adam/monaco-lean4@bd9197b.