• Changed polylines intersects polygons function to first make a shape index of the polygons and then perform a series of contains point queries to identify if any of the vertices fall inside the polygon. If this doesn't yield a result, it means that there is an edge crossing with no vertex overlap, so we perform all edge intersect queries
• Removed unnecessary loop within edge crossing logic
• Changed polyline intersects envelope by checking each vertex's bounds and then doing an edge crossing check
• Removed unecessary loop within this edge crossing logic as well
• Fixed polyline intersects circle logic. Previously would only check a single edge of the polyline before exiting the function
• Added contains logic for points and multipoints as they are very similar to intersects.
• Added appropriate test cases covering edge cases

Note
LineString contains LineString is theoretically possible, but there is no native support for this and trying to come up with an implementation myself proved futile. Perhaps we can consider this as a TODO for the future.