yoda: fork pivot — Wayland-only + ungate winit + soft-fork libcosmic-yoda (squashed)

Squash of 7 yoda commits forming the fork pivot:
- 255cf7cc rename: libcosmic -> libcosmic-yoda (fork 0.1.0-yoda)
- 8701aa31 feat(yoda): Wayland-only cut — drop winit and x11 features
- 6736a596 yoda: soft-fork pivot — keep Cargo name 'libcosmic' for dep unification
- 3e23d087 yoda: re-apply hard rename — libcosmic -> libcosmic-yoda (0.1.0-yoda)
- aec3eb61 yoda: ungate remaining winit+wayland combined cfgs
- 8ab7b158 yoda-v2: color_picker Theme ref + context_menu/menu ungate winit
- 8d1d8739 yoda: drop x11 defaults on iced_winit + iced_tiny_skia

src/command.rs

@@ -27,12 +27,10 @@ pub fn set_title<M>(id: window::Id, title: String) -> iced::Task<crate::Action<M
     iced::Task::none()
 }
 
-#[cfg(feature = "winit")]
 pub fn set_scaling_factor<M: Send + 'static>(factor: f32) -> iced::Task<crate::Action<M>> {
     iced::Task::done(crate::app::Action::ScaleFactor(factor)).map(crate::Action::Cosmic)
 }
 
-#[cfg(feature = "winit")]
 pub fn set_theme<M: Send + 'static>(theme: crate::Theme) -> iced::Task<crate::Action<M>> {
     iced::Task::done(crate::app::Action::AppThemeChange(theme)).map(crate::Action::Cosmic)
 }