logiguard fork v3: full patch set on verified 8c74db0 tree

Includes prior-session patches (carry forward so the app compiles):
  - crates/gpui/build.rs: cross-compile manifest fix
  - crates/gpui/src/platform.rs: PlatformWindow::activate_with_token trait method
  - crates/gpui/src/window.rs: Window::activate_with_token public API
  - crates/gpui_linux/src/linux/wayland/window.rs: WaylandWindow::activate_with_token + activate() keyboard-serial fix

Plus the focus-serial fix:
  - serial.rs: SerialKind::KeyboardEnter
  - client.rs: store wl_keyboard.enter serial; latest_serial_of()

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

extensions/test-extension/extension.toml

@@ -0,0 +1,25 @@
+id = "test-extension"
+name = "Test Extension"
+description = "An extension for use in tests."
+version = "0.1.0"
+schema_version = 1
+authors = ["Marshall Bowers <elliott.codes@gmail.com>"]
+repository = "https://github.com/zed-industries/zed"
+
+[language_servers.gleam]
+name = "Gleam LSP"
+language = "Gleam"
+
+[grammars.gleam]
+repository = "https://github.com/gleam-lang/tree-sitter-gleam"
+commit = "8432ffe32ccd360534837256747beb5b1c82fca1"
+
+[[capabilities]]
+kind = "process:exec"
+command = "echo"
+args = ["hello from a child process!"]
+
+[[capabilities]]
+kind = "process:exec"
+command = "cmd"
+args = ["/C", "echo", "hello from a child process!"]