Make SIWE optional

[Martibis]

What problem does this new feature solve?

On my application I have different type of users, for the sake of simplicity, let's call them minters and artists.

• An artist can release a work on my platform and has to interact with our back-end so SIWE makes sense.
• A minter only has to connect + mint the work, this can all happen from the front-end, so there is no need for SIWE

Currently, there's no way to make SIWE optional (it's either there, or it isn't).

Describe the solution you'd like

Make SIWE optional (e.g.: a button for connecting (not using SIWE) and a button for signing in (using SIWE).

[linear]

APKT-331 Make SIWE optional