Syntax highlighting without QML LSP - Non-basic parts

Why?

Cause

• As Android developer I want to have syntax helper for reading, understanding, modifying and writing QML code
• Based on 3rd party testing, this feature was appreciated by developers

Customer

Cruft

• We have basics already (found good), should we put effort to QML LSP instead?
• Most of the stuff is copied from an abandoned plugin, but we don't fully understand the inner workings.

What?

Definition

• I want to highlight QML syntax so that user experience is better

Demarcation

• This is not a QML LSP support.  It is in it's own scope QTTA-34

Dependencies

• FF?