chore: switch to Nix flakes, and update all dependencies
Resolves https://github.com/input-output-hk/daedalus/issues/3292 It’s been long overdue. The version currently used by Daedalus (0d1d5f036c73d18e641412d2c58d4acda592d493) doesn’t even build on Hydra… There supposedly is some indeterminism in its build.