tp and tag structures

Allows people to teleport to the nearest structure and tag them so that they can teleport to the desired structure 

How it works:
- add a tag to the nearest structure you are in or even all the structures within a certain radius:
      Ex:  /structure add village[tag=(your choice)]
- then you can teleport to it:
      Ex:  /tp @s structure[tag=(any structure you tagged)]

(Basically allows you to save the cords of any number of structures with a name to help you remember which one it is.)