Add CI with lint & unit tests

.flake8

.gitignore

.gitlab-ci.yml

.isort.cfg

.pre-commit-config.yaml

README.md

nerval/evaluate.py

requirements.txt

setup.py

tests/test_align.py

tests/test_compute_matches.py

tests/test_compute_scores.py

tests/test_get_tags_aligned.py

tests/test_parse_bio.py

tests/test_run.py

tox.ini