Turbidity_Animated_Timeseries_notebook (#1073)

* Turbidity_Animated_Timeseries_notebook

Proposed real world example notebook "Turbidity_animated_timeseries" created by Joram Downes

* Grammatical and facet plots labelling updates - work in progress

* updates to dea_tools functions required by turbidity notebook

* reviewed turbidity notebook

I have suggested a couple of changes and implemented them in this commit. They include:
- land masking each image against itself rather than against a single image in the time series. I thought that this would make the outputs more dynamic and will handle tide and flooded inland waterways.
- simplified your cloud masking function but its outputs should be unchanged
- I have made a separate PR to the dea_tools module to include an NDTI index. (As there was already a tillage index, our version is called NDTI2). I have updated the notebook to use this calculation.
- The dea_tools PR also includes an update to the rgb plotting function to enable the addition of titles to subplots. In this case, the titles now note the image timesteps that users can use to identify timesteps for the animations.
- I have consolidated the animation timestep selection into a single new variable.
- I also added a direct comparison of the animations datasets to confirm that their datestamps are the same.
- Finally, I made a couple minor grammatical changes.

* Delete bandindices.py

I temporarily added the updated script while reviewing the notebook. I'm deleting it now to avoid conflicts with the dea_tools PR that will add these changes to the repo.

* Delete plotting.py

I temporarily added the updated script while reviewing the notebook. I'm deleting it now to avoid conflicts with the dea_tools PR that will add these changes to the repo.

* addressing merge conflicts

* addressing merge conflicts

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Co-authored-by: Claire Phillips <claire.phillips@ga.gov.au>