Enum naming convention in the source code

[kleonc]

@OverloadedOrama, what's the preffered enum naming convention?
Names of enums I've added recently are clearly wrong and I wanted to fix them but it seems that not all enums in the codebase follow the same convention. Both EnumName and Enum_Name are used. So which one is preffered?

[OverloadedOrama]

I recommend following the official GDScript style guidelines, so for enums, the name of the enum should be in PascalCase and the names of its members should be in CONSTANT_CASE.