update .gitignore and .gitattributes

.gitattributes

.gitignore

.pre-commit-config.yaml

.python-version

.vscode/launch.json

.vscode/ltex.dictionary.en-US.txt

.vscode/tidal_flat.code-workspace

LICENSE

README.md

example/example.ipynb

example/tides.csv

images/inundations.png

images/platform.png

images/results.png

images/simulation.gif

images/tides_summary.png

poetry.lock

pyproject.toml

setup.cfg

src/tidal_flat/__init__.py