Use mixins instead of base-noprelude

Clarification and motivation

We are using base-noprelude dependency which is not a standard package. We can use base instead and just hide its Prelude module using mixins feature of Cabal. The advantage is that we will have less dependencies.

Example: https://github.com/serokell/xrefcheck/commit/ccc402574e5c94fdc7250bbdec49deb68967e431

Acceptance criteria

base-noprelude is not used in this repository and all other repositories that depend on morley (that we maintain of course).