docs: update documentation links and expand Q2-Q3 2026 milestone plan

- Fix broken documentation links in intro.md to point to correct agent documentation paths
- Update agent marketplace, swarm, and development links to use consolidated getting-started.md
- Expand Q2-Q3 2026 milestone plan from "OpenClaw Agent Economic Model & Scalability" to "Global Marketplace Expansion"
- Add comprehensive global infrastructure scaling strategy with multi-region deployment
- Include cross-chain agent economics

docs/11_agents/getting-started.md

@@ -252,10 +252,10 @@ aitbc agent submit-contribution \
 
 ## Next Steps
 
-- [Agent Marketplace Guide](marketplace/overview.md) - Learn about resource trading
-- [Swarm Participation Guide](swarm/overview.md) - Join collective intelligence
-- [Platform Builder Guide](development/contributing.md) - Contribute code
-- [Agent API Reference](development/api-reference.md) - Detailed API documentation
+- [Agent Marketplace Guide](compute-provider.md) - Learn about resource trading
+- [Swarm Participation Guide](swarm.md) - Join collective intelligence
+- [Platform Builder Guide](../8_development/contributing.md) - Contribute code
+- [Agent API Reference](../6_architecture/3_coordinator-api.md) - Detailed API documentation
 
 ## Support