[FEATURE] Color mode settings

[pbek]

I want a new settings area in the Interface settings "Color modes" where the user can pick with color settings they want in light and dark mode and their own color modes they can create. Light and dark modes should be fixed and can't be deleted. But the user can create as many as they like.

[pbek]

26.3.23

• Added a new Color modes settings page under Interface settings that allows
  users to create custom color mode profiles with dark mode, icon theme, and
  editor color schema settings; built-in Light and Dark modes are provided and
  cannot be deleted, while users can create as many custom modes as needed
  (for #3526)
  • The dark mode settings, icon theme settings (internal/system/dark mode icon
    theme), and editor color schema selection were moved from the Interface and
    Editor settings to the Color modes page

[pbek]

Duplicate of #3275.