Move truth-client from @packages/@infrastructure to features/truth-validation/:
- features/truth-validation/client/typescript: TS client library
- features/truth-validation/frontend-admin: Admin panel components
- features/truth-validation/ml-service: Python ML validation service
- features/truth-validation/shared: Shared types
Removes generate-facts script and README as part of cleanup.
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>