Python script that attempts to generate a reasonable list of overlay ids for tileset making

[int-ua]

Summary

SUMMARY: Infrastructure "Script that generates a list of possible overlay ids"

Purpose of change

Verifying tileset ids, detecting what doesn't have a sprite.

Describe the solution

Python script that uses util.import_data and tries to replicate Character::get_overlay_ids and cata_tiles::find_overlay_looks_like behaviour.

Testing

./tools/json_tools/generate_overlay_ids.py

Additional context

Ultica Tracker spreadsheet, not sure if I should post the link here, ask at Discord.