Missing functions for binary searches

[poke1024]

I'm missing some function for doing binary searches on arrays in GDScript.

Now, I'd add one, only there needs to be some discussion how and where. Should it be:

(1) a builtin GDScript function like clamp and max?
(2) an extension of Array? But that's a core extension and the core must stay minimal.
(3) some kind of utils package that people can use, like Python's bisect package

My personal favorite would be adding a bisect_left and bisect_right to Array.

[akien-mga]

I think it should be added to Array.

[poke1024]

Merged now.