hub : chore: rename everything to alby hub (#217)

Breaking change:

- Wails app default directory is now `albyhub`, not `alby-nwc`

- Wails mac filename is `albyhub` not `AlbyHub` just to be consistent

everywhere

- ~~Wails app executable is now `albyhub`, not `Nostr-Wallet-Connect`~~

_EDIT: we override the output filename in the action, so no change_

Other changes:

- RPI links go to getalby.com zero links instead of this repository

https://github.com/getAlby/hub/commit/2d3326059d99712548b024bed67b5e6252e3e5a9