feat: Check if token is a JWT

[juancarlospaco]

What kind of change does this PR introduce?

• Check if token arg is a JWT string.
• Based (but not copied) from https://github.com/supabase/supabase-js/blob/6193a967a8d07605889446e9eabab149a275ee54/src/lib/helpers.ts#L75

[silentworks]

I have a PR open for this on the supabase-py repo supabase/supabase-py#977

[juancarlospaco]

But some users may want to import and use a particular API by itself, like using the functions API directly etc, to keep them usable standalone.

I think the Supabase main library should be like a thin layer that amalgamates all other libraries together, a modular way, but the libraries should still be usable standalone and have all their related logic living in themselves.

Let me know any comments and ideas. 🙂

[J0]

Should be fine to check on both supabase-py and have an additional safeguard in functions-py I think. Going to approve but do check in with @silentworks about #977 before merging

[silentworks]

I think the Supabase main library should be like a thin layer that amalgamates all other libraries together, a modular way, but the libraries should still be usable standalone and have all their related logic living in themselves.

@juancarlospaco I agree with this comment, lets get these merged in then.