## Changes
1. Fixed `observations_history` order to ensure consistency in data processing.
2. Removed row-column dependencies in `config.yaml` and explicitly specified joint order.
3. Simplified launch files: Now, different models for single robot can be launched specified using `cfg:=`. Example:
```bash
roslaunch rl_sar gazebo_go2.launch cfg:=himloco
```
4. Moved `command_mapping` and `state_mapping` from *.hpp to `config.yaml` for better configuration management.
5. Added simulation and deployment SDK for `GoldenRetriever-l4w4` robot.
6. Added support for pretrained models of `go2`, `go2w`, `b2`, `b2w`, `a1`.
7. Reorganized the project structure:
- Moved SDK to `thirdparty/`.
- Moved core libraries to `core/`.
8. Fixed duplicate `#ifndef` issues in hpp files.