Feature request: Make horizontal accuracy 'required' for geospatial data

[billgeo]

Is your feature request related to a problem? Please describe.
Horizontal accuracy should be mandatory for all collections where there is geospatial data.

Options to determine if data is Geospatial:

1. Use some other STAC metadata, i.e linz:geospatial_type or the spatial object?
2. Scan the data to determine if it has a geospatial element

Describe the solution you'd like
Add the two horizontal accuracy fields to this (+ some tests).

stac/extensions/quality/schema.json

Line 16 in beb8079

"required": ["quality:lineage"],

Describe alternatives you've considered
Part of LINZ metadata review decisions

[billgeo]

Creasted draft PR here #77

[billgeo]

Check if this makes sense for all datasets.

[billgeo]

Have clarified that this should only be mandsatory for 'geospatial' datasets, so it would have to be conditional on some other metadata, perhaps the linz 'geospatial_type' field, or else detected from the dataset itself. Either of those would require some significant development, so we've decide to leave it optional for now and will review later.

[billgeo]

Duplicate of #100 . Closing.