[3.5] Input -> "Get Controller Color" function for GDScript

[halotroop2288]

int get_color();
int get_joy_color(int p_device);

• By default, this method should return white for all 8 controllers.
• On Nintendo Switch, controller color should be retrieved from the actual controller metadata.
• On PS4, or PC the color can be grabbed from the DualShock 4 light bar.
• On other platforms, the color schemes can be overridden with constant values.
• Such as on Wii, where the color scheme looks like:
  • Player 1: Blue
  • Player 2: Red
  • Player 3: Green
  • Player 4: Yellow
  • Players 5-8: White (N/A)