Liquid democracy on Solidago

[lenhoanglnh]

The goal is to develop the algorithmic pipeline to enable liquid democracy on Tournesol.
In particular, the backend should have solutions to combine users' trusts and delegations to output voting rights.
For security, each user should only have a bounded influence on the output voting rights, which is proportional to a sum of their initial trust and the delegations they receive.

The algorithm is still being drafted in this overleaf: https://www.overleaf.com/project/673ccafe062cb5df048a374e
(and the security theorems remain to be proved)

Note that they require inverting Steps 2 and 3 of Solidago's pipeline.