Implement OpenSCAD LSP (Language Server Protocol) in editor

LSP "Language Server Protocol" is used by all developer IDE's to support things like intellisense. LSP provides a common standard between applications so that every code editor doesn't need to write support for every language.

https://microsoft.github.io/language-server-protocol/

There is already an openscad LSP built for vscode and linked below:

[openscad
](https://github.com/Leathong/openscad-support-vscode)

The advantage of implementing the LSP approach to the internal cadhub editor is that it will allow the same editor to quickly drop in LSP providers for even more languages (such as .gcode or .svg)

Start with the Language Server Protocol specification and the linked openscad-support-vscode project, then inspect how the CadHub editor is structured. Done means the editor supports the OpenSCAD LSP and provides an approach that can accommodate additional language servers such as gcode or svg.

Written by the indexing model from the issue text.