Project manager: support for LSP

[diegoiast]

Steps:

• Find a suitable library and incorporate it.
• qmdiLib: we have API for calling other plugins (PluginManager::open()) - but we have no way of getting back data from that plugin:
  • The idea is that the text editor would request the plugin manager : "ask the plugins for tooltip for file %s, line/row %d/%d" - and in return that API would return a JSON or something. If no request is made - the text editor should not display a tooltip, or a limited one at least.
  • We can also have a plugin that works on ctags or something, which will have limited capabilities.
  • ctags can be run: ctags -R --exclude=build --languages=C,C++,Python,Java,JavaScript,Rust,Go,ObjectiveC
  • parser for ctags is simple to create using chatgpt.

[diegoiast]

Status:
I have an LSP client library which I incorporated. However, even basic "lets run clang" does not work. At this moment.
Tested only on Linux.