• enhancement: updated validation logic for pandoc
• enhancement: updated from using run_sync to using anyio.run_process
• testing: enabled testing on trio backend (both asyncio and trio)
• fix: issue with tesseract process deadlock on Linux (switched aware from anyio.to_process and restricted max threads by setting OMP_MAX_THREAD="1")
• fix: minimal pandoc version, changed from v 3 to 2 because for many distros 3 is still unavailable or beta