Support spatial filter operators

[bjornharrtell]

I think the operations from this list that are predicates would be relevant to support as filter operators:

https://docs.microsoft.com/en-us/ef/core/modeling/spatial

Most relevant are probably the ones that are supported by all providers for the geometry type:

• Contains
• Crosses
• Disjoint
• Intersects
• IsWithinDistance
• Overlaps
• Within