Throw error for GET request URL limit

[chkim-usgs]

The SpiceQL Cassini tutorial originally was failing in the getTargetStates() call because the step was set to 4000. We found that the big ets payload caused too big of a URL that the URL was truncated and resulted in a 400 error. Find the limit for the GET request URL character limit and throw an error to catch this.

[Kelvinrr]

potentially, we can also do a POST request if it's too big.

[jrcain-usgs]

Does #114 (dealing with getTargetStates specifically) solve this issue? Do any other calls need a switch for large URLs or would a general switch be needed?