Add argparse for CLI in simulator script

An argparse has been added to the overcooked simulator script for better configuration of the command line interface. This allows the user to input the state file, visualization configuration and output filename when executing the script. As a result, the need to manually update these parameters in the script has been mitigated.

overcooked_simulator/gui_2d_vis/drawing.py

+import argparse
 import colorsys
 import json
 import math
@@ -523,9 +524,32 @@ def save_screenshot(state: dict, config: dict, filename: str | Path) -> None:
 
 
 if __name__ == "__main__":
-    with open(ROOT_DIR / "gui_2d_vis" / "visualization.yaml", "r") as conf_file:
-        viz_config = yaml.safe_load(conf_file)
-    with open(ROOT_DIR / "gui_2d_vis" / "sample_state.json", "r") as jsonf:
-        sample_state = json.load(jsonf)
-    screenshot_filename = ROOT_DIR / "gui_2d_vis" / "screenshot.jpg"
-    save_screenshot(sample_state, viz_config, screenshot_filename)
+    parser = argparse.ArgumentParser(
+        prog="Overcooked Simulator Image Generation",
+        description="Generate images for a state in json.",
+        epilog="For further information, see https://scs.pages.ub.uni-bielefeld.de/cocosy/overcooked-simulator/overcooked_simulator.html",
+    )
+    parser.add_argument(
+        "-s",
+        "--state",
+        type=argparse.FileType("r", encoding="UTF-8"),
+        default=ROOT_DIR / "gui_2d_vis" / "sample_state.json",
+    )
+    parser.add_argument(
+        "-v",
+        "--visualization_config",
+        type=argparse.FileType("r", encoding="UTF-8"),
+        default=ROOT_DIR / "gui_2d_vis" / "visualization.yaml",
+    )
+    parser.add_argument(
+        "-o",
+        "--output_filename",
+        type=str,
+        default="screenshot.jpg",
+    )
+    args = parser.parse_args()
+    with open(args.visualization_config, "r") as f:
+        viz_config = yaml.safe_load(f)
+    with open(args.state, "r") as f:
+        state = json.load(f)
+    save_screenshot(state, viz_config, args.output_filename)