Geospatial filter operators

Geospatial query:

• $geoIntersects
• $geoWithin
• $near
• $nearSphere
• $box (legacy syntax only)
• $center (legacy syntax only)
• $centerSphere (legacy syntax only)
• $geometry
• $maxDistance
• $minDistance
• $polygon (legacy syntax only)

We will not implement the legacy coordinates pair system for now.