Allow configuration of a camera angle for preset views in the Cesium Viewfinder

[robyngit]

The new viewfinder in Cesium maps allows configuring areas of interest to highlight. The location for each "view" is set with a lat, lon, and height, but it would be nice to allow setting a heading, pitch, & roll like we do for the "home" position, see

metacatui/src/js/models/maps/Map.js

Lines 130 to 159 in 59466ab

	/**
	* Coordinates that describe a camera position for Cesium. Requires at
	* least a longitude and latitude.
	* @typedef {Object} MapConfig#CameraPosition
	* @property {number} longitude - Longitude of the central home point
	* @property {number} latitude - Latitude of the central home point
	* @property {number} [height] - Height above sea level (meters)
	* @property {number} [heading] - The rotation about the negative z axis
	* (degrees)
	* @property {number} [pitch] - The rotation about the negative y axis
	* (degrees)
	* @property {number} [roll] - The rotation about the positive x axis
	* (degrees)
	*
	* @example
	* {
	* longitude: -119.8489,
	* latitude: 34.4140
	* }
	*
	* @example
	* {
	* longitude: -65,
	* latitude: 56,
	* height: 10000000,
	* heading: 1,
	* pitch: -90,
	* roll: 0
	* }
	*/

This feature would be particularly useful for zooming into 3D datasets, e.g: