Caché language syntax for Visual Studio Code

Features

Features I implemented
- Formatter that will format the first character of every line to be a tab when it isnt a label and will add comments to the end of lines if it doesnt contain any commands
- Automatically indents with mumps formatting when it finds a loop or you are inside a loop
- Added javadoc label commenting using ctrl + d
- Enter / tab to remove / add mumps indentation
Features in David Gileadi's extension
- Syntax / language highlighting
- Jumping to labels
- Hover hints for labeled code blocks (I changed the format)

This language support is very basic (and possibly buggy) because it only does simple parsing and doesn't use a full interpreter.