Implement the GIS function ST_IsValid

Returns 1 if the argument is geometrically valid, 0 if the argument is not geometrically valid. A geometry is valid when:

• Simple: The geometry must not self-intersect.
• Properly Closed: For polygons, the geometry must form a closed ring.
• Consistent Orientation: The exterior boundary of a polygon must be counterclockwise, and interior boundaries (holes) must be clockwise.
• No Repeated Points: Points should not be repeated in the definition of the geometry.
• Proper Nesting: Holes must be properly nested within the exterior boundary and must not overlap.
• Non-Empty: The geometry cannot be empty. The only valid empty geometry is represented in the form of an empty geometry collection value.