Initial commit: Go driver for the Lian Li Galahad II LCD

Streams H.264 to the Galahad II LCD via USB (gousb) with:
- ffmpeg CLI transcoding (no fragile FFmpeg C-ABI bindings)
- pure-Go Annex-B access-unit splitting
- framerate pacing with graceful shutdown and USB reconnect
- TOML config, cobra CLI, structured slog logging, unit tests

Makefile

@@ -0,0 +1,33 @@
+BINARY  := galahad2lcd
+PKG     := ./cmd/galahad2lcd
+VERSION ?= $(shell git describe --tags --always --dirty 2>/dev/null || echo dev)
+LDFLAGS := -s -w -X main.version=$(VERSION)
+
+.PHONY: all build test vet lint fmt install uninstall clean
+
+all: build
+
+build:
+	go build -trimpath -ldflags "$(LDFLAGS)" -o bin/$(BINARY) $(PKG)
+
+test:
+	go test ./...
+
+vet:
+	go vet ./...
+
+fmt:
+	gofmt -l -w cmd internal
+
+lint:
+	go vet ./...
+	gofmt -l cmd internal
+
+install: build
+	install -m 0755 bin/$(BINARY) /usr/local/bin/$(BINARY)
+
+uninstall:
+	rm -f /usr/local/bin/$(BINARY)
+
+clean:
+	rm -rf bin