Suppression de la visualisation Texture GLCM

- Suppression de generate_texture() de visualizations.py
- Suppression de l'entrée 'texture' de VIZ_STEPS et COLORMAPS
- Suppression du test TestTexture
- Mise à jour README (19 → 18 visualisations)
- Mise à jour CLAUDE.md (17 → 16 fonctions generate_*)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lidar_pipeline/tests/test_visualizations.py

@@ -190,14 +190,6 @@ class TestWavelet:
         assert result.exists()
 
 
-class TestTexture:
-    def test_generates_tif(self, synthetic_dem, tmp_output_dir):
-        from lidar_pipeline.visualizations import generate_texture
-        result = generate_texture(synthetic_dem, "test", tmp_output_dir, 5.0)
-        assert result is not None
-        assert result.exists()
-
-
 class TestFlow:
     def test_generates_tif(self, synthetic_dem, tmp_output_dir):
         from lidar_pipeline.visualizations import generate_flow