Move some classes to their expected location

[SirYwell]

Overview

Description

Some dependencies as well as 2 WE classes currently aren't in the correct packages. Aligning the packages with what WE ships will improve compatibility.
This might break other plugins directly depending on FAWE, but I consider it a bug fix.

Submitter Checklist

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1. Make sure you are opening from a topic branch (/feature/fix/docs/ branch (right side)) and not your main branch.
2. Ensure that the pull request title represents the desired changelog entry.
3. New public fields and methods are annotated with @since TODO.
4. I read and followed the contribution guidelines.