add all crates: domain, protocol, application, client, adapters, ESP32 firmware

Server: domain (entities, value objects, ports), protocol (postcard wire types),
application (config service, data projection), adapters (config-memory, tcp-server),
bootstrap (composition root with fake data).

Client: client-domain (layout engine, render tree, HAL ports),
client-application (message handling, repaint commands),
adapters (tcp-client, display-terminal), client-desktop (end-to-end working).

ESP32: client-esp32 firmware with ILI9341 display over SPI, WiFi networking.
Display test verified on hardware — landscape orientation, text rendering works.

60 workspace tests, all passing.

crates/client-esp32/src/config.rs

@@ -0,0 +1,22 @@
+use std::time::Duration;
+use esp_idf_hal::units::Hertz;
+use client_domain::BoundingBox;
+
+pub const SCREEN_WIDTH: u16 = 320;
+pub const SCREEN_HEIGHT: u16 = 240;
+pub const SCREEN: BoundingBox = BoundingBox {
+    x: 0,
+    y: 0,
+    width: SCREEN_WIDTH,
+    height: SCREEN_HEIGHT,
+};
+
+pub const SPI_BAUDRATE: Hertz = Hertz(26_000_000);
+pub const SPI_BUFFER_SIZE: usize = 512;
+
+pub const NET_THREAD_STACK_SIZE: usize = 8192;
+pub const NET_READ_TIMEOUT: Duration = Duration::from_millis(10);
+pub const NET_POLL_INTERVAL: Duration = Duration::from_millis(50);
+pub const NET_RECONNECT_DELAY: Duration = Duration::from_secs(2);
+
+pub const RENDER_POLL_INTERVAL: Duration = Duration::from_millis(100);