feat(yoda): Wayland-only cut — drop winit and x11 features

Part of the yoda fork direction: libcosmic-yoda is Wayland-only going forward.

Cargo.toml changes:
- default features: remove winit, x11, iced-wayland, multi-window -> add wayland
- applet feature: remove winit dep
- merge iced-wayland into wayland (simpler feature graph)
- remove winit, winit_debug, winit_tokio, winit_wgpu, x11, iced-wayland features
- keep iced_winit dep (it's a misnomer — also hosts the wayland/cctk runtime)

Workspace:
- examples/* excluded (many depend on winit/x11) — revisited in a later phase

Behavior:
- Library builds clean in release with default features (cargo check + cargo build --release --lib OK)
- 58 lines in src/ gated on feature "winit" become unreachable (dead-code warnings — cleanup deferred)
- 108 lines gated on feature "wayland" now always active via default

--all-features is known-broken because tokio/async-std/smol are mutually
exclusive — this is pre-existing, not a Phase 2 regression.

Cargo.toml

@@ -9,12 +9,10 @@ name = "cosmic"
 
 [features]
 default = [
-    "winit",
     "tokio",
     "a11y",
     "dbus-config",
-    "x11",
+    "wayland",
-    "iced-wayland",
     "multi-window",
 ]
 advanced-shaping = ["iced/advanced-shaping"]
@@ -35,7 +33,6 @@ animated-image = [
 autosize = []
 applet = [
     "autosize",
-    "winit",
     "wayland",
     "tokio",
     "cosmic-panel-config",
@@ -81,32 +78,24 @@ tokio = [
     "cosmic-config/tokio",
 ]
 # Tokio async runtime
-# Wayland window support
+# Wayland window support (yoda fork is Wayland-only; this feature is always active in default)
-iced-wayland = [
+wayland = [
     "ashpd?/wayland",
     "autosize",
     "iced/wayland",
     "iced_winit/wayland",
-    "surface-message",
-]
-wayland = [
-    "iced-wayland",
     "iced_runtime/cctk",
     "iced_winit/cctk",
     "iced_wgpu/cctk",
     "iced/cctk",
     "dep:cctk",
+    "surface-message",
 ]
 surface-message = []
 # multi-window support
 multi-window = []
 # Render with wgpu
 wgpu = ["iced/wgpu", "iced_wgpu"]
-# X11 window support via winit
-winit = ["iced/winit", "iced_winit"]
-winit_debug = ["winit", "debug"]
-winit_tokio = ["winit", "tokio"]
-winit_wgpu = ["winit", "wgpu"]
 # Enables XDG portal integrations
 xdg-portal = ["ashpd"]
 qr_code = ["iced/qr_code"]
@@ -119,7 +108,6 @@ async-std = [
     "zbus?/async-io",
     "iced/async-std",
 ]
-x11 = ["iced/x11", "iced_winit/x11"]
 
 [dependencies]
 apply = "0.3.0"
@@ -246,9 +234,10 @@ members = [
     "cosmic-config",
     "cosmic-config-derive",
     "cosmic-theme",
-    "examples/*",
 ]
-exclude = ["iced"]
+# examples/* excluded — many depend on the removed winit/x11 features.
+# They will be revisited and adapted in a later phase.
+exclude = ["iced", "examples"]
 
 [workspace.dependencies]
 dirs = "6.0.0"