feat: update start api to be async

[im-adithya]

Fixes #542

(The video is outdated, removed messages from Setup Screen, we only show them in the Start screen now)

What Changed

https://github.com/getAlby/nostr-wallet-connect-next/assets/64399555/6c103fb4-6c7e-477a-be35-ca392e6d3a5b

[im-adithya]

Not sure if I should do this for wails, I think we should, but there isn't no option to check if the unlock password im wails, why is that? cc @rolznz

[rolznz]

Not sure if I should do this for wails, I think we should, but there isn't no option to check if the unlock password im wails, why is that? cc @rolznz

@im-adithya we don't have an unlock screen on Wails because it can't be accessed from the outside. So I don't think it's necessary to make any changes there.

[im-adithya]

Makes sense, that's what i thought, leaving this for Wails 👍