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

go.mod

@@ -0,0 +1,14 @@
+module galahad2lcd
+
+go 1.26.6
+
+require (
+	github.com/BurntSushi/toml v1.6.0
+	github.com/google/gousb v1.1.3
+	github.com/spf13/cobra v1.10.2
+)
+
+require (
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/spf13/pflag v1.0.9 // indirect
+)