allow searching for assets by class name (e.g., IntHeroAbilityDictionary or whatever)

[therealchjones]

https://github.com/therealchjones/mffer/blob/936459487352354003ca4a31a35a2769bcdc82ff/src/DataSource.cs#L264-L264

[therealchjones]

Maybe go by the same method I use to find the right file manually?

• find the script and get pathid
• find the behavior by pathid
• find the behavior pathid
• find the behavior asset name by pathid in manifest

[therealchjones]

fixed in #251