Implement [Spinner] properties and update defaults

[grzegorzdec]

https://github.com/magic-script/magic-script-components/issues/231

Name	Type	Default Value	Required	Description
type	string	n/a		The loading spinner type (sprite-animation or particle-package).
resourceId	number	0		The resource ID.
resourcePath	string	''		The resource path in the resource (optional).
height	number	0		The height of the loading spinner (optional).

Name	Type	Default Value	Description
value	number		Sets a normalized value between 0-1 for loading completeness, with 0 being no progress and 1 fully complete. This is used only when the loading spinner is determinate.
size	vec2		Sets the loading spinner size. This affects the visual scale of all sprite-based loading spinners but has no affect on the visual scale of a particle-based spinner. Modify the particle files directly to adjust the particle effect size. This does affect, and should be used to adjust, the bounds of all loading spinners.