Idea: generic project manager integration protocol

[X547]

Instead of hardcoding of BeIDE or Palladin, it would be nice to have some generic protocol that would allow to use arbitrary project manager application. I am planning to make Meson project manager.

Project manager application tasks:

• Perform build actions (compile, clean, install etc.)
• Report build errors
• Show project file tree
• Provide include file list
• Configure project (set per-project options, used compiler etc.)
• ...