entities: document ReturnIfNonInteractive

[kemenaran]

For the lack of a better name.

[daid]

Pretty sure this is one of those functions that exists in multiple banks.

[kemenaran]

@daid indeed; I ended up documenting all the variants in entities bank too.

[daid]

I think the function that prevents link from walking into an NPC is also duplicated across multiple banks. As well as talking to NPCs. See: https://github.com/daid/LADXR/blob/master/patches/multiworld.py#L57

[kemenaran]

Yup, there are a handful of them–and labeling the duplicates will make the entities code easier to read.

I created an issue for this: #383

(Nice bit of assembly code in your multiworld script btw ✨)