[Feat] Add support for OpenBlock Labs OB1

[avishj]

^ Title, they have a new daily credit program. Would be nice to track balance here.

[avishj]

@hanrw can I add this?

[hanrw]

@hanrw can I add this?

Definitely! I've just implemented an extensions feature – you can check it out in docs/features/extensions.md. Do you think we could try it out?

[hanrw]

After that, we can release an OpenBlock Labs OB1 extension and install it.

[avishj]

Interesting, I'll check it out, thanks!