Release v0.3.0: Agent Economy with CDP and AgentKit Integration

[AKKI0511]

Release v0.3.0

This release introduces a significant new feature: Agent Economy with Coinbase Developer Platform integration, enabling autonomous payments between agents.

Key Features

• Agent Payment Capabilities: Integration with Coinbase Developer Platform (CDP) SDK and AgentKit
• Wallet Management: Persistence for agents with wallet_manager utilities
• Standalone Agent Functions: New chat method in AIAgent, enhanced HumanAgent with response callbacks
• Improved Collaboration: Asynchronous request status checking for better timeouts handling
• Enhanced Monitoring: Better reasoning step visualization in callbacks for all LLM providers
• Comprehensive Documentation: End-to-end developer guides

Breaking Changes

• None

Migration Notes

• Users who want to enable payments will need CDP credentials in their environment variables

This PR completes the work on the feature/agent-payments branch and prepares it for release.