Add openrgb-hue: Hue scene gradients for OpenRGB lights

Applies gradients derived from 103 bundled Philips Hue scenes to
OpenRGB-controlled LEDs, with six mapping modes (sequence, per-device,
per-zone, matrix, mirror, shuffle) and five animation modes (static,
scroll, pingpong, pulse, wave). Typer/Rich CLI with dry-run preview,
device/zone targeting, and a scenes-update command to refresh the
bundled dataset from its source gist.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

tests/test_cli.py

@@ -0,0 +1,64 @@
+import pytest
+from typer.testing import CliRunner
+
+from openrgb_hue.cli import app
+
+runner = CliRunner()
+
+
+def test_scenes_list_shows_scene_count():
+    result = runner.invoke(app, ["scenes", "list"])
+    assert result.exit_code == 0
+    assert "103" in result.output
+
+
+def test_scenes_list_filter():
+    result = runner.invoke(app, ["scenes", "list", "--filter", "tropical"])
+    assert result.exit_code == 0
+    assert "Tropical twilight" in result.output
+
+
+def test_scenes_show_known_scene():
+    result = runner.invoke(app, ["scenes", "show", "Tropical twilight"])
+    assert result.exit_code == 0
+    assert "Tropical twilight" in result.output
+    assert "Derived gradient" in result.output
+
+
+def test_scenes_show_unknown_scene_errors():
+    result = runner.invoke(app, ["scenes", "show", "Definitely Not A Scene"])
+    assert result.exit_code == 1
+
+
+@pytest.mark.parametrize("mapping_mode", ["sequence", "per-device", "per-zone", "mirror", "shuffle"])
+def test_apply_dry_run_across_mapping_modes(mapping_mode):
+    result = runner.invoke(app, ["apply", "Tropical twilight", "--dry-run", "--mapping", mapping_mode])
+    assert result.exit_code == 0, result.output
+    assert "synthetic LEDs" in result.output
+
+
+def test_apply_dry_run_matrix_radial():
+    result = runner.invoke(
+        app,
+        ["apply", "Tropical twilight", "--dry-run", "--mapping", "matrix", "--direction", "radial"],
+    )
+    assert result.exit_code == 0, result.output
+
+
+@pytest.mark.parametrize("mode", ["static", "scroll", "pingpong", "pulse", "wave"])
+def test_animate_dry_run_across_animation_modes(mode):
+    result = runner.invoke(
+        app, ["animate", "Tropical twilight", "--dry-run", "--mode", mode, "--dry-run-frames", "3"]
+    )
+    assert result.exit_code == 0, result.output
+    assert "t=0.00s" in result.output
+
+
+def test_apply_unknown_scene_errors():
+    result = runner.invoke(app, ["apply", "Not A Real Scene", "--dry-run"])
+    assert result.exit_code == 1
+
+
+def test_apply_unknown_mapping_mode_errors():
+    result = runner.invoke(app, ["apply", "Tropical twilight", "--dry-run", "--mapping", "nonsense"])
+    assert result.exit_code == 1