Add AgentCore Browser Tool Support

[razkenari]

Summary

Add Amazon Bedrock AgentCore Browser support to FAST, enabling AI agents to autonomously browse the web with real-time live view streaming for end users. This includes new agent patterns, a browser tool integration, and frontend tool rendering for the browser live view.

Scope

1. Agent Patterns

Multi-agent pattern:

• Strands agent with browser-use library + Claude for autonomous browser control
• Includes all the existing Gateway MCP tools and Code Interpreter, and the new Browser tool

Single-agent patterns:

• strands-browser-agent — Strands SDK with browser tool only
• novaAct-browser-agent — NovaAct SDK with browser tool
• browserUse-agent — BrowserUse SDK with browser tool

3. Frontend: Tool Rendering

BrowserToolDisplay.tsx — Custom tool renderer registered for name === "browser":

• Expandable view showing: Input (task + URL) → Browser actions → Result
• Real-time streaming of browser actions during execution
• Embedded DCV live view via BrowserLiveView component (memoized to prevent reconnections)

BrowserLiveView.tsx — Wrapper around bedrock-agentcore npm package:

• Uses official BrowserLiveView component from bedrock-agentcore/browser/live-view