Update to clarin json

pyproject.toml

src/easymatcher_worker.py

tests/example_data/expected/document1.jsonl

tests/example_data/expected/document2.jsonl

tests/example_data/expected/document_with_concrete.jsonl

tests/example_data/expected/documents.jsonl

tests/example_data/input/document1.jsonl

tests/example_data/input/document1.txt

tests/example_data/input/document2.jsonl

tests/example_data/input/document2.txt

tests/example_data/input/document_with_concrete.jsonl

tests/example_data/input/document_with_concrete.txt

tests/fixtures/example_data.py

tests/worker/test_worker.py