[Feature] Contesting evaluations

[bitbeckers]

Goal

Allow for the user to review evaluations and contest evaluations on hypercerts that they own

User stories

• As a contributor, I want to flag that I contest an evaluation, so that I can open a dialogue with the evaluators
• As a evaluation, I want to be prompted by the app that my evaluation has been contested
• As a funder, I want to be able to inspect hypercerts, their evaluations, contestations and outcomes to that I can assess the impact claimed.