Removed creature events from monsters script interface

[dudantas]

Description

Resolves #278

Scripts cannot be placed inside the monsters folder, as it is the monsters only interface, all other types of scripts need to be in the scripts folder.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I checked the PR checks reports
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works