FancyNpcs Custom Models

Commit hash: af5aed6

Commit message: fancynpcsmodel: Add amount_npcs_with_custom_model metric

(The last commit message does not always directly reflect the changes related to this version.)

Keep in mind that this is a snapshot version. Snapshot versions are not meant to be used in production. They are for testing purposes only and may contain bugs or incomplete features. Use at your own risk.