Linux window decorations (#13611)

This PR adds support for full client side decorations on X11 and Wayland

TODO:
- [x] Adjust GPUI APIs to expose CSD related information
- [x] Implement remaining CSD features (Resizing, window border, window
shadow)
- [x] Integrate with existing background appearance and window
transparency
- [x] Figure out how to check if the window is tiled on X11
- [x] Implement in Zed
- [x] Repeatedly maximizing and unmaximizing can panic
- [x] Resizing is strangely slow
- [x] X11 resizing and movement doesn't work for this:
https://discord.com/channels/869392257814519848/1204679850208657418/1256816908519604305
- [x] The top corner can clip with current styling
- [x] Pressing titlebar buttons doesn't work
- [x] Not showing maximize / unmaximize buttons
- [x] Noisy transparency logs / surface transparency problem
https://github.com/zed-industries/zed/pull/13611#issuecomment-2201685030
- [x] Strange offsets when dragging the project panel
https://github.com/zed-industries/zed/pull/13611#pullrequestreview-2154606261
- [x] Shadow inset with `_GTK_FRAME_EXTENTS` doesn't respect tiling on
X11 (observe by snapping an X11 window in any direction)

Release Notes:

- N/A

---------

Co-authored-by: conrad <conrad@zed.dev>
Co-authored-by: Owen Law <81528246+someone13574@users.noreply.github.com>
Co-authored-by: apricotbucket28 <71973804+apricotbucket28@users.noreply.github.com>
Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/collab_ui/src/collab_ui.rs

@@ -10,7 +10,7 @@ use std::{rc::Rc, sync::Arc};
 pub use collab_panel::CollabPanel;
 use gpui::{
     point, AppContext, Pixels, PlatformDisplay, Size, WindowBackgroundAppearance, WindowBounds,
-    WindowKind, WindowOptions,
+    WindowDecorations, WindowKind, WindowOptions,
 };
 use panel_settings::MessageEditorSettings;
 pub use panel_settings::{
@@ -63,8 +63,9 @@ fn notification_window_options(
         kind: WindowKind::PopUp,
         is_movable: false,
         display_id: Some(screen.id()),
-        window_background: WindowBackgroundAppearance::default(),
+        window_background: WindowBackgroundAppearance::Transparent,
         app_id: Some(app_id.to_owned()),
         window_min_size: None,
+        window_decorations: Some(WindowDecorations::Client),
     }
 }