From Discord: Add JSON Schema Draft-04 generation for AWS AppConfig

[effect-bot]

Summary

AWS AppConfig inline validators only support JSON Schema Draft-04, while the library currently exposes JsonSchema.toDocumentDraft07. A user asked whether Draft-04 can be generated directly or if the Draft-07 output must be manually rewritten, and shared an initial recursive conversion approach. There is currently no built-in Draft-04 converter, but maintainers are open to considering adding one.

Discord thread

https://discord.com/channels/795981131316985866/1533019535165358190

[pullfrog]

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