Cargo.toml: patch libcosmic via local path for dev builds

Activates the [patch.'https://github.com/pop-os/libcosmic'] override
pointing at ../libcosmic, enabling local development against a
patched libcosmic checkout (e.g. to pick up
WindowControlsPosition / macOS-style window controls).

This branch is intentionally dev-local: do NOT merge upstream.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Cargo.toml

@@ -70,7 +70,9 @@ debug = true
 onig = { git = "https://github.com/rust-onig/rust-onig.git", branch = "main" }
 onig_sys = { git = "https://github.com/rust-onig/rust-onig.git", branch = "main" }
 
-# [patch.'https://github.com/pop-os/libcosmic']
-# libcosmic = { git = "https://github.com/pop-os/libcosmic//" }
-# cosmic-config = { git = "https://github.com/pop-os/libcosmic//" }
-# cosmic-theme = { git = "https://github.com/pop-os/libcosmic//" }
+[patch.'https://github.com/pop-os/libcosmic']
+libcosmic = { path = "../libcosmic" }
+cosmic-config = { path = "../libcosmic/cosmic-config" }
+cosmic-theme = { path = "../libcosmic/cosmic-theme" }
+iced_futures = { path = "../libcosmic/iced/futures" }
+iced_winit = { path = "../libcosmic/iced/winit" }