fix: title bar buttons work with a finger on Wayland (Issue #36)

winit 0.29 draws the title bar itself on Wayland but only handles the
mouse there. A vendored copy of winit 0.29.15 (vendor/winit, used via
[patch.crates-io]) passes touches on the decorations to the frame like a
left click, so close, minimize and maximize work with a finger and
dragging the title bar moves the window.

CI no longer sets a global -D warnings, which would also apply to the
vendored crate; clippy still runs with -D warnings.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Cargo.toml

@@ -69,3 +69,8 @@ strip = true
 tempfile = "3.27.0"
 # Prüft den WGSL-Shader in den Tests (dieselbe Version wie in wgpu 0.19)
 naga = { version = "0.19", features = ["wgsl-in"] }
+
+# winit 0.29 with touch support for the client-side title bar on Wayland (Issue #36),
+# see vendor/winit/README.ink-notes.md
+[patch.crates-io]
+winit = { path = "vendor/winit" }