Add JUV_SUBSTRATE field with autocomplete to annotation UI

Adds JUV_SUBSTRATE field to the annotation form, table, and modal, including an autocomplete feature for both the form and table cell editing. Updates the annotation table to display and allow editing of JUV_SUBSTRATE, adjusts table columns for improved clarity, and ensures correct pane usage for Leaflet layers. Also refines field clearing and saving logic to support the new field.

Author: MichaelAkridge-NOAA