feat(docs): autonomous structured expansion on AI Agent Context Injection Pipelines

[beginwebdev2002]

Autonomous creation of docs/ai-agent-context-injection-pipelines.md establishing best practices and strict architectural constraints for Context Injection Pipelines. Updated bilingual README folder indices accordingly.

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PR created automatically by Jules for task 11262226452973184673 started by @beginwebdev2002

[google-labs-jules]

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