[Idea]: Teleport safety should check for entity on the destination block

[SlimeDog]

/mvtp world has the quality of teleporting a player to the exact spawn point (within safe constraints). The problem I experience in testing is that a player or mob already standing on the spawnpoint "swallows up" the arriving player. I have searched in vain for a configuration or command option to include an existing entity in the definition of "safe" or otherwise transport the new arrival a little to the side if another entity is already there. I appreciate that this might not always be desirable -- for example, in a default void world the spawn area might consist of a single block -- but sometimes it might be desirable. Any ideas?

[SlimeDog]

My skills are insufficient to create a PR. If someone else would like to take that on, I would be happy to test.