chore: Use WorldEdit logger interface

[NotMyFault]

Overview

Description

Use WorldEdit logger implementation, inspired by a recent PR which mistakenly used it.

Untested, because sed goes brrr, however, the format change goes from PlotSquared/<caller class> to FQN.<caller class>.

Submitter Checklist

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