Fix: Add temporary callout warnings to inform users of url and endpoint changes

Description

This PR adds temporary callout warnings to API and Usage Example overviews to inform users that

API urls are changing (to production openveda.cloud endpoints)
Notebook examples will be updated after breaking changes are introduced by updating tiling dependencies

N/A Choose one of the following and delete the rest (read more)

Quickstart: Accessing the Data Directly Quickstart: Using the Raster API Tutorial Dataset

The following checklist ensures that our notebooks are internally consistent (read more)

N/A no notebook changes but quarto preview rendered locally

[ ] The first cell contains the rendering information with author and data
[ ] The notebook has a Run this Notebook section (with filename in link)
[ ] The notebook has an Approach section
[ ] All the packages that are imported in the notebooks are used within the notebook
[ ] Any complex geometries are accessed from remote storage
[ ] Each code cell comes after a markdown cell containing explantory text
[ ] All cells in the notebook book have been run in order with a fresh kernel (cell numbers should be 1, 2, 3, 4, ...)
[ ] If the example type is Dataset the filename is <collection_id>.ipynb