Add latest changes to stable (#1264)

* Fix deprecation warnings and speed up code

* Change last modified date

* Intertidal exposure (#1261)

* New files for intertidal exposure notebook

* minor editing to Load packages cells

* Updated discord and removed slack links

* Improved markdown linking to image and gif in Introduction

* Incorporated SS and MA reviews

* Updated to include RBT reviews

* Minor pip install and notebook naming edits. Add notebook to README

* adding renamed exposure notebook back into PR

* adding global SAR access through microsoft planetary compute (#1263)

* adding global SAR access through microsoft planetary compute

* Make minor spelling and formatting amendments.

* small changes for PR

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Co-authored-by: geoscience-aman <[email protected]>

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Co-authored-by: Aman Chopra <[email protected]>
Co-authored-by: geoscience-aman <[email protected]>
Co-authored-by: ClaireP <[email protected]>
Co-authored-by: Alex Bradley <[email protected]>