logiguard fork: GPUI xdg-activation keyboard-focus serial fix

Single-commit orphan branch: full zed-industries/zed @ 8c74db0 source tree
with a 3-file patch applied (no upstream history).

Patch (crates/gpui_linux/src/linux/wayland/):
  - serial.rs: add SerialKind::KeyboardEnter
  - client.rs: store wl_keyboard.enter serial; add latest_serial_of()
  - window.rs: activate() uses keyboard-enter serial (Mutter focus gate)

Mutter honors window activation only when the token carries the keyboard-
focus serial from wl_keyboard.enter; GPUI used a stale mouse-press serial.
See docs/tray-window-focus-wayland.md in logiguard.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

crates/file_finder/Cargo.toml

@@ -0,0 +1,53 @@
+[package]
+name = "file_finder"
+version = "0.1.0"
+edition.workspace = true
+publish.workspace = true
+license = "GPL-3.0-or-later"
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/file_finder.rs"
+doctest = false
+
+[dependencies]
+anyhow.workspace = true
+channel.workspace = true
+client.workspace = true
+collections.workspace = true
+editor.workspace = true
+file_icons.workspace = true
+futures.workspace = true
+fuzzy.workspace = true
+fuzzy_nucleo.workspace = true
+gpui.workspace = true
+language.workspace = true
+menu.workspace = true
+open_path_prompt.workspace = true
+picker.workspace = true
+project.workspace = true
+settings.workspace = true
+serde.workspace = true
+theme.workspace = true
+ui.workspace = true
+ui_input.workspace = true
+util.workspace = true
+workspace.workspace = true
+zed_actions.workspace = true
+project_panel.workspace = true
+
+[dev-dependencies]
+ctor.workspace = true
+editor = { workspace = true, features = ["test-support"] }
+gpui = { workspace = true, features = ["test-support"] }
+
+picker = { workspace = true, features = ["test-support"] }
+pretty_assertions.workspace = true
+serde_json.workspace = true
+theme = { workspace = true, features = ["test-support"] }
+workspace = { workspace = true, features = ["test-support"] }
+zlog.workspace = true
+remote_connection = { workspace = true, features = ["test-support"] }
+theme_settings = { workspace = true, features = ["test-support"] }

crates/file_finder/LICENSE-GPL

@@ -0,0 +1 @@
+../../LICENSE-GPL