Add Odin binding to community GDExtension binding list

[dresswithpockets]

Adds a link to the odin-godot GDExtension binding to the community-maintained binding list.

[dsnopek]

I presume review from the GDExtension team was requested to see if the binding was "well-developed enough" like the docs say :-)

Unfortunately, it's really hard to review bindings for languages that I don't know, especially if the binding is written in the language itself, which appears to be the case here.

I usually end up looking for community indicators, like the number of GitHub stars (61), issues (1 closed), PRs (3 closed). Going by those indicators, this project appears to be somewhat less active and popular than other bindings we have listed. But Odin is also a less popular programming language than the others too?

It's super hard to say. Unless there's someone in the community we know and trust who knows Odin and can review better, I would probably err on the side of including it (there's no issues complaining it doesn't work at all :-)), and we can always remove later if there's problems?

[tetrapod00]

Yeah, I was looking for a general assessment. Thanks for taking a look. This one did seem okay to me on the metrics I can see, within the realm of recently approved Nim on stars (~60), but with less overall history and contributors than the Nim bindings.

In general I also would err on the side of including bindings in our docs and removing them later if they are no longer maintained. So I think this one is good enough to include.