[#73] Replace `Kind.Type` with `Type`.

Description

Problem: Writing Kind.Type everywhere is too verbose.

Solution: Firstly, rename data Type from Michelson.Untyped.Type with Ty. Secondly, use Prelude.Type instead of Data.Kind.Type everywhere, which leads to replacing Kind.Type with just a Type. Add changes to morley's and lorentz's CHANGES.md

Related issue(s)

Resolves #73 (closed)

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