Update tweaks for recursive prompt discovery

[Darkamunday]

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CONTRIBUTING.md — including the grant that lets the
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What does this PR do?

Summary

This PR adds support for recursively discovering prompt pack JSON files.

Previously PromptChain only loaded prompt packs located directly inside the prompts directory. This change allows prompt packs to be organized into subfolders while remaining fully backwards compatible.

Example:

PromptChain/
└── prompts/
├── Characters/
├── Hair/
├── Eyes/
├── Clothing/
├── Lighting/
└── Styles/

Changes

• Replace Path.glob("*.json") with Path.rglob("*.json") when loading prompt packs.
• Replace Path.glob("*.json") with Path.rglob("*.json") when deleting prompts.
• Update documentation comments to reflect recursive loading.

Testing

• ✅ Prompt packs load correctly from the root prompts folder.
• ✅ Prompt packs load correctly from nested subfolders.
• ✅ Existing prompt packs continue to work unchanged.

Related issues

Checklist

• I have read and agree to CONTRIBUTING.md.