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>

vendor/winit/README.ink-notes.md

@@ -0,0 +1,18 @@
+# winit 0.29.15 for ink-notes
+
+Copy of [winit 0.29.15](https://crates.io/crates/winit/0.29.15) (Apache-2.0, see
+`LICENSE`), used through `[patch.crates-io]` in the top-level `Cargo.toml`. Examples, tests and
+docs of the original crate were removed.
+
+## Changes
+
+- `src/platform_impl/linux/wayland/seat/touch/mod.rs`: on Wayland, winit draws the title bar
+  itself (client-side decorations) but only handles the mouse there. Touches on the title bar
+  are now passed to the frame like a left click: close, minimize and maximize work with a
+  finger, and dragging the title bar moves the window (Issue #36). All changes are marked with
+  `ink-notes patch`.
+- `Cargo.toml`: `[lints.rust] warnings = "allow"`, because a path dependency is not built with
+  capped lints like a crates.io dependency.
+
+Remove the copy and the `[patch.crates-io]` entry when ink-notes moves to a winit version that
+handles touch on its decorations.