Experiment to implement custom TypeScriptEditor

[angelozerr]

Today, ts files are opened with JSDT Editor, but there are several problems:

• double parsing of ts file (on JSDT client editor + on tsserver side).
• cannot override outline, open hierarchy, format, etc

This issue is about implementing a custom TypeScriptEditor, but it's a lot of work. I would like to reuse some JSDT features like syntax coloration to benefit with UI preferences to customize color, etc

[angelozerr]

I close this issue since TypeScript editor was implemented from scratch but it uses some features of JSDT like syntax coloration, match bracket etc. In other words this editor uses the whole features of JSDT which don't need the AST which can be slow.

The goal of this TypeScript editor is to have a very fast editor when a ts file is opened. According my tests, this editor is very fast when a big ts file is opened.