added better cmake syntax highlighting, cmake-tools package

[DARKMOONlite]

After finding out that the poor syntax highlighting for CMakeFiles was for me a product of 1 out of date cmake extension. I decided that the overall styling of cmake files in Andromeda could be improved by adding tokens generated by the cmake tools package to the theme files, as otherwise most of it is parsed as a string and special cmake variables, flags and arguments like VERSION or CMAKE_CXX_STANDARD aren't coloured by Andromeda at all.

(while technically all variables in cmakes are strings; if quoted and unquoted constant have the same colour,i think it makes CMakeFiles confusing and changes the overall theme from in comparison to most other file types in Andromeda)

I'm going to look into writing a pull request on the cmake tools package to try and improve the cmake tokenising to include the REQUIRED flag and strings that only contain numerical values like 3.1.0

Example:

Before

After