mod: syntax highlighting: Improve syntax highlighting - Add some keywords (#454)
mod: syntax highlighting: Improve syntax highlighting - Add some keywords (#454)

* Add `allowmixing` keyword

Add `allow(_)?mixing` keyword

* Add `assume transparent (dark|light)` preproc kw

Add : 
- `!assume transparent (dark|light)` on Preprocessings

* mod: fix: autonumber resume - add: autonumber inc

Mod:
- fix: `autonumber resume`
- add: `autonumber inc`
qjebbs/vscode-plantuml,qjebbs/vscode-plantuml,qjebbs/vscode-plantuml