Give users ability to pre-configure stac_ipyleaflet map

[emmalu]

• stac ipyleaflet version: for release 0.3.0
• Python version: python >= 3.9 (some of the widgets are incompatible at v 3.8)
• Reference column Number 35-36 in the MAAP-ipyleaflet-DevRoadmap

Context

We are working to continue developing this mapping library as a resource for VEDA, in addition to MAAP. A user should have the ability to pre-configure settings & data-sources from which to load the stac_ipyleaflet library for a custom version of the map.

Problem

Only the MAAP STAC catalog is currently supported, as it is hardcoded as part of the library. We need to expose the ipyleaflet map settings to allow users to pre-determine what catalog (or catalogs) to connect to.

Acceptance Criteria

• Users have access to pre-defined catalogs that include the VEDA STAC catalog
• Users have ability to determine other map settings when intializing the stac_ipyleaflet library, including:
  • which STAC catalog(s) to connect to
  • zoom level
  • basemap to load by default