More options for class name variations

[markspacehub]

The class name is used to set the file name. I have come across use cases where I need the class name set in an lower/upper camel case (classNameExample/ClassNameExample) and the file names be underscore separated (class_name_example.h/.cpp).
Is it possible to provide more commands than the current class name variations? Ideally one of the following would allow the described use case:

CLASSNAMECAMELLOWER - converts an underscore separated CLASSNAME input into camelCase
CLASSNAMECAMELUPPER - converts an underscore separated CLASSNAME input into CamelCase

CLASSNAMEUNDERSCORED - converts a CamelCase CLASSNAME input into Camel_Case (or camelCase into camel_Case) - keeping the capitals as input
CLASSNAMEUNDERSCOREDUPPER - converts a CamelCase CLASSNAME input into CAMEL_CASE
CLASSNAMEUNDERSCOREDLOWER - converts a CamelCase CLASSNAME input into camel_case

[tzAcee]

Will take a look into it, as soon as I have the tests going.