Integrate syntax checker into project and pipeline

Related effort tracking issue: https://code.asam.net/internal/avenyr-asam/-/issues/228 Merge request: https://code.asam.net/simulation/openscenario/2.x/-/merge_requests/477

Description

The idea is to integrate the available py-osc2 syntax checker into this project so that the pipeline checks (select) osc(2) files for their syntax. The script shall also be usable locally to verify examples and such before pushing them to remote.