Remove fp-ts and effect-ts

[NickSeagull]

The goal of those libraries is to provide better error handling through compile-time checks, but they are written in a "let's take this thing that works in Scala and Haskell and translate it to TypeScript without caring about syntax, documentation, nor usability".

Someone coming directly from those languages can grasp the concepts easily and start coding without having to look at documentation, but the rest of folks not.

There are other ways to enforce better error handling, especially if we adopt a class-based approach (see #1381 )