refactor: (env_manager, rbs_runtime) and add YAML config loading

- Updated `camera.py` to use consistent float literals for default spawn positions.
- Removed unused import statements and organized imports in `robot.py` and `scene.py`.
- Removed debugging import from `scene.py` to clean up codebase.
- Added a new YAML configuration file (`default-scene-config.yaml`) for scene settings.
- Implemented a scene configuration loader function in `rbs_runtime/__init__.py` to read and parse YAML config files.
- Modified `runtime.py` to utilize the newly added scene config loader and removed in-code default scene setup.
- Updated `setup.py` to include `config` directory in package data.
- Changed `rbs_robot.launch.py` to use position control strategy by default.
- Refactored `skills.launch.py` with cleaner parameter definitions and reactivated commented-out nodes.

env_manager/rbs_runtime/rbs_runtime/__init__.py

@@ -0,0 +1,18 @@
+from pathlib import Path
+
+import yaml
+from dacite import from_dict
+from env_manager.models.configs import SceneData
+
+
+def scene_config_loader(file: str | Path) -> SceneData:
+    def tuple_constructor(loader, node):
+        return tuple(loader.construct_sequence(node))
+
+    with open(file, "r") as yaml_file:
+        yaml.SafeLoader.add_constructor("!tuple", tuple_constructor)
+        scene_cfg = yaml.load(yaml_file, Loader=yaml.SafeLoader)
+
+    scene_data = from_dict(data_class=SceneData, data=scene_cfg)
+
+    return scene_data