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/rpc/Cargo.toml

@@ -0,0 +1,43 @@
+[package]
+description = "Shared logic for communication between the Zed app and the zed.dev server"
+edition.workspace = true
+name = "rpc"
+version = "0.1.0"
+publish.workspace = true
+license = "GPL-3.0-or-later"
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/rpc.rs"
+doctest = false
+
+[features]
+gpui = ["dep:gpui"]
+test-support = ["collections/test-support", "gpui/test-support", "proto/test-support"]
+
+[dependencies]
+anyhow.workspace = true
+async-tungstenite.workspace = true
+base64.workspace = true
+collections.workspace = true
+futures.workspace = true
+gpui = { workspace = true, optional = true }
+parking_lot.workspace = true
+proto.workspace = true
+rand.workspace = true
+rsa.workspace = true
+serde.workspace = true
+serde_json.workspace = true
+sha2.workspace = true
+strum.workspace = true
+tracing = { version = "0.1.34", features = ["log"] }
+util.workspace = true
+zstd.workspace = true
+
+[dev-dependencies]
+collections = { workspace = true, features = ["test-support"] }
+gpui = { workspace = true, features = ["test-support"] }
+proto = { workspace = true, features = ["test-support"] }
+zlog.workspace = true