- Add clang-format file
- Add scripts and format check for CI
    - script for checking the format (bash)
    - script for formatting the code (bash)
- Add format checking to CI
- Reformat project with clang-format

- changed dialogue "Open MoCap" to "Manage MoCap"
- enable loading multiple MoCap-Files (or same with different offset)
- enable unloading MoCap-Files
- save all files in pet and load when opening project