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/setup.py

@@ -16,6 +16,10 @@ setup(
             os.path.join("share", package_name, "launch"),
             glob(os.path.join("launch", "*launch.[pxy][yma]*")),
         ),
+        (
+            os.path.join("share", package_name, "config"),
+            glob(os.path.join("config", "*config.[yma]*")),
+        ),
     ],
     install_requires=["setuptools"],
     zip_safe=True,