[Suggestion] Allow changing a material's color via CT

[Charnuz]

Is your feature request related to a problem? Please describe.
I need to change the color of existing materials to match items added by other mods. This would also let users fix something like #1561 on their own.

Additional context
Did compile with this change and it seems work just fine,

[warjort]

Did compile with this change and it seems work just fine,

What change are you referring to?
This is already possible. "color" is a mutable material property
https://docs.blamejared.com/1.12/en/Mods/GregTechCE/Material/

[warjort]

What change are you referring to?

I see, the field is final in the actual code.

    @ZenProperty("color")
    public final int materialRGB;