logiguard fork v2: patched GPUI on verified 8c74db0 tree

Rebuilt from the exact zed-industries/zed @ 8c74db00c4053d6c0a9037863d7bd048658da4ca
tree (previous orphan was based on a stale/wrong fetch). Same 3-file patch:
  - 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)

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

crates/extension_cli/Cargo.toml

@@ -0,0 +1,36 @@
+[package]
+name = "extension_cli"
+version = "0.1.0"
+edition.workspace = true
+publish.workspace = true
+license = "GPL-3.0-or-later"
+
+[lints]
+workspace = true
+
+[[bin]]
+name = "zed-extension"
+path = "src/main.rs"
+
+[dependencies]
+anyhow.workspace = true
+clap = { workspace = true, features = ["derive"] }
+cloud_api_types.workspace = true
+env_logger.workspace = true
+extension.workspace = true
+fs.workspace = true
+gpui_platform.workspace = true
+language.workspace = true
+log.workspace = true
+reqwest_client.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+serde_json_lenient.workspace = true
+settings_content.workspace = true
+snippet_provider.workspace = true
+task.workspace = true
+theme_settings.workspace = true
+tokio = { workspace = true, features = ["full"] }
+toml.workspace = true
+tree-sitter.workspace = true
+wasmtime.workspace = true