Support for FES2014 tide model via CNES aviso-fes.

[rtaib]

• Coded as replacement drop-in for coastal.py
• See documentation in pyfes_model.py

Proposed changes

A drop-in alternative to the OTPS tide model in Tools/dea_tools/coastal.py which defaults to OTPS and then tries to use aviso-fes, if installed, to calculate tide heights. It is coded as a new pyfes_model.py with the same method signatures as the current code to allow seamless swapping without changes to the current code. However, the user needs to set the FES2014_OCEAN_INI environment variable as explained in the docstring for the module.
An example of use is provided in Real_world_examples/Coastal_erosion.ipynb.

Closes issues (optional)

• NA

Checklist (replace [ ] with [x] to check off)

• Notebook created using the DEA-notebooks template
• Remove any unused Python packages from Load packages
• Remove any unused/empty code cells
• Remove any guidance cells (e.g. General advice)
• Ensure that all code cells follow the PEP8 standard for code. The jupyterlab_code_formatter tool can be used to format code cells to a consistent style: select each code cell, then click Edit and then one of the Apply X Formatter options (YAPF or Black are recommended).
• Include relevant tags in the final notebook cell (refer to the DEA Tags Index, and re-use tags if possible)
• Clear all outputs, run notebook from start to finish, and save the notebook in the state where all cells have been sequentially evaluated
• Test notebook on both the NCI and DEA Sandbox (flag if not working as part of PR and ask for help to solve if needed)
• If applicable, update the Notebook currently compatible with the NCI|DEA Sandbox environment only line below the notebook title to reflect the environments the notebook is compatible with

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[robbibt]

This looks great to me, thanks for this! Depending on whether we can find an easy way to install aviso-fes, we might end up adopting a similar approach later on as the default way to model tides in the DEA Sandbox too