Add cargo weight and draw argument support

Introduces cargo weight and draw argument properties to units across backend, frontend, and Python API. Adds related commands, data extraction, and registration logic, enabling setting and reading of cargo weight and custom draw arguments for units. Includes new API examples and updates to interfaces, data types, and Lua backend for full feature integration.

scripts/python/API/example_precise_movement.py

@@ -0,0 +1,24 @@
+from api import API
+
+def on_api_startup(api: API):
+    units = api.update_units()
+    for unit in units.values():
+        if unit.name == "Infantry AK Ins":
+            current_pos = unit.position
+            next_pos = current_pos.project_with_bearing_and_distance(20, 0)  # Move 20 meters north
+            next_pos.threshold = 2 # Set threshold to 1 meter, very precise
+            unit.set_path([next_pos])
+
+##############################################################################################
+# Main entry point for the script. It registers the callbacks and starts the API.
+##############################################################################################         
+if __name__ == "__main__":
+    # Initialize the API
+    api = API()
+    
+    # Register the callbacks
+    api.register_on_startup_callback(on_api_startup)
+
+    # Start the API, this will run forever until stopped
+    api.run()
+