[mig] Migration to 14.0 + add pre-commit changes

.editorconfig

.eslintrc.yml

.flake8

.gitignore

.isort.cfg

.pre-commit-config.yaml

.prettierrc.yml

.pylintrc

.pylintrc-mandatory

README.rst

__init__.py

__manifest__.py

controllers/main.py

controllers/union_sociale.py

datas/bordereau_refund_wizard_quarter_data.xml

datas/ir_sequence_data.xml

datas/mail_data.xml

datas/queue_job_data.xml

migration/14.0.1.0.0/post-migration.py

migration/14.0.1.0.0/pre-migration.py