add lightcontrol rust tool

Three binaries against the c-base mainhall rig:

- lightcontrol: TUI with 15 animated presets, live matelight-sync via
  the /monitor WebSocket, and a microphone beat detector that drives
  the BeatPulse preset across RGB PARs, CB-100 colour-wheels, and
  TSL-250 scanners.
- panels: one-shot RGB wash for the Showtec LED Par 56 wall panels via
  dmxbackend.
- bars: ArtNet direct driver for the Stairville SonicPulse LED bars,
  with ArtPoll discovery and a universe sweeper.

Shared lib code (fixture model, render pipeline, matelight + beat
modules) lives in src/lib.rs. Mic feature behind the default `mic`
cargo feature so builds without ALSA dev libs work via
--no-default-features.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Cargo.toml

@@ -0,0 +1,23 @@
+[package]
+name = "lightcontrol"
+version = "0.1.0"
+edition = "2021"
+
+[features]
+default = ["mic"]
+mic = ["dep:cpal"]
+
+[dependencies]
+anyhow = "1"
+cpal = { version = "0.15", optional = true }
+crossterm = "0.28"
+futures-util = { version = "0.3", default-features = false, features = ["sink"] }
+ratatui = "0.29"
+reqwest = { version = "0.12", features = ["json"] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+tokio = { version = "1", features = ["rt-multi-thread", "macros", "sync", "time"] }
+tokio-tungstenite = "0.24"
+
+[profile.release]
+lto = "thin"