add csv export to DEA WIT notebook

[BexDunn]

Proposed changes

Adds a csv export to the WIT notebook, explains the data in the export

Checklist

(Replace [ ] with [x] to check off)

• [x] Notebook created using the DEA-notebooks template
• [x] Remove any unused Python packages from Load packages
• [x] Remove any unused/empty code cells
• [x] Remove any guidance cells (e.g. General advice)
• [x] 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).
• [x] Include relevant tags in the final notebook cell (refer to the DEA Tags Index, and re-use tags if possible)
• [x] 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
• [x] Check for any spelling mistakes using the DEA Sandbox's built-in spellchecker (double click on markdown cells then right-click on pink highlighted words). For example:

[review-notebook-app[bot]]

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[BexDunn]

I haven't managed to catch the previously updated knowledge hub links in this correctly, so have converted it to draft for now

[benji-glitsos-ga]

Hi Bex,

It looks great. Some minor notes about the links:

• When linking to a KH product, you don't need to include the ?tab=overview part at the end. The link can just be: https://knowledge.dea.ga.gov.au/data/product/dea-coastlines/
• Instead of linking to the datahandling github file, you can link to the API documentation which also links to the source code: https://knowledge.dea.ga.gov.au/notebooks/Tools/gen/dea_tools.datahandling/