Add ALE Psych topic

[immalloy]

Please confirm this pull request meets the following requirements:

• I followed the contributing guidelines: https://github.com/github/explore/blob/main/CONTRIBUTING.md.
• This change is not self-promotion.

Which change are you proposing?

• Suggesting edits to an existing topic or collection
• Curating a new topic or collection
• Something that does not neatly fit into the binary options above

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Curating a new topic or collection

• I've formatted my changes as a new folder directory, named for the topic or collection as it appears in the URL on GitHub (e.g. https://github.com/topics/ale-psych)
• My folder contains a *.png image (if applicable) and index.md
• All required fields in my index.md conform to the Style Guide and API docs: https://github.com/github/explore/tree/main/docs

ALE Psych is an established Friday Night Funkin’ modding engine fork with active community use and multiple contributors. It provides a flexible, modder friendly mods system for creating mods, and repositories already rely on it across GitHub.

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Please note: we will close your PR without comment if you do not check the boxes above and provide ALL requested information.

[jmeridth]

🛑 Thank you for the contribution ❤️. Unfortunately, as per our contribution guidelines, we don't allow self promotion:

Avoid conflicts of interest. These should be of general community interest, not self promotions. If it is self promotion, it’s unlikely to be accepted.

We do this so that project get curated if there is enough support/activity in the community. Thank you!