feat(docs): autonomous structured expansion on ai-agent-token-optimization-strategies

[beginwebdev2002]

Autonomously authored a new best-practices architectural guide on "AI Agent Token Optimization Strategies" in docs/ai-agent-token-optimization-strategies.md. The document strictly adheres to the repository's CODE_OF_CONDUCT.md, featuring:

• Complete YAML Frontmatter with mandatory tags.
• The 4-step Pattern Lifecycle (Bad Practice, Problem, Best Practice, Solution).
• Context pruning and vector search rules for deterministic multi-agent state execution.
• Mermaid Process Flow diagram using official design tokens.
• Integration into the _sidebar.md navigation and the generated sitemap.xml.

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PR created automatically by Jules for task 10973072573365110842 started by @beginwebdev2002

[google-labs-jules]

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