Add integration tests for examples

[TimmRuppert]

Describe the feature

It might be a bit too much to add unit test and most of the example code is already just in one main function. But we can add integration tests to ensure they not only build to actually run as well.

Maybe using a little python scripts, e.g.

test/examples/test_convert_osi2mcap.y

import subprocess
import tempfile
import os
from pathlib import Path

def test_convert_osi2mcap():
    with tempfile.TemporaryDirectory() as temp_dir:
        # TODO Create test input OSI file, e.g. using writer 

        # Run converter with different options
        subprocess.run([
            "./convert_osi2mcap",
            str(input_path),
            str(output_path),
            "--compression", "zstd",
            "--chunk_size", "786432"
        ], check=True)

if __name__ == "__main__":
  test_convert_osi2mcap()
        

in the cmake

add_test(
  NAME example_convert_osi2mcap
  COMMAND python3 ${CMAKE_CURRENT_SOURCE_DIR}/examples/test_convert_osi2mcap.py
)

Additionally, this helps to "proof" that the examples are working in case someone new might face a local configuration error.