Activate ECDSA signatures

[NicoSerranoP]

In the /src/pages/doubleSign.tsx, there is a section that retrieves potPubkeys from the wasm (use wasm.getPotPubkeys) and signs it using Metamask. This section should be activated when the sequencer/crypto library implements a getPotPubkeys function (checkout derive_taus).

[NicoSerranoP]

I am currently working on integrating the double signature code from the sequencer into the rust wrapper: https://github.com/zkparty/wrapper-small-pot.

I will test/integrate the BLS signature and the ECDSA together in the nico-activate-ecdsa branch :)