Add pygame tests

This commit introduces a new test suite for the pygame functionality. It includes tests for color formatting and uniqueness, angle calculations, and proper initialization of the Visualizer. The tests aim to enhance game integrity and avoid potential issues with visualization.

tests/test_pygame.py

+import yaml
+
+from cooperative_cuisine import ROOT_DIR
+from cooperative_cuisine.pygame_2d_vis.drawing import calc_angle, Visualizer
+from cooperative_cuisine.pygame_2d_vis.game_colors import RGB, WHITE, colors
+
+
+def test_colors():
+    assert RGB(red=255, green=255, blue=255).hex_format() == "#FFFFFF"
+    assert WHITE.hex_format() == "#FFFFFF"
+    assert len(colors) >= 552
+
+
+def test_calc_angle():
+    assert calc_angle([0.0, 1.0], [1.0, 0.0]) == -90.0
+    assert calc_angle([1.0, 1.0], [1.0, -1.0]) == -90.0
+
+
+def test_visualizer():
+    with open(ROOT_DIR / "pygame_2d_vis" / "visualization.yaml", "r") as file:
+        visualization_config = yaml.safe_load(file)
+
+    vis = Visualizer(visualization_config)
+
+    vis.create_player_colors(10)
+    assert len(vis.player_colors) >= 10
+    assert len(set(vis.player_colors)) >= 10