Add support for auto completing game objects

[atomicptr]

It would be cool if I'm typing

"/" and then get a list of all associated collections game object paths

same with "#"

or well

"/player#" should maybe offer its components

Rough idea on how this could be done:

1. Figure out which .go file(s) our .script is a part of
2. index all components inside that go and offer that for things like #
3. find all collections the go file(s) are a part of and index that for things like /