feat(MCP): Add MCP Server integration to Golem CLI

[AJ0070]

Key Changes

• Added --serve flag to start Golem CLI as an MCP server
• Added --serve-port flag (default: 1232)
• Exposes MCP tools for executing Golem CLI commands:
  • execute_golem_command – Generic command execution with arguments
  • execute_golem_cli_command – Structured command execution with command path
• Dynamic tools automatically discovered from CLI metadata (e.g., golem_component_list, golem_agent_info, golem_app_list)
• Provides access to Golem manifest files as MCP resources (current dir, ancestors, children)
• MCP functionality is feature-gated behind --features mcp

Usage

# Start MCP server with default port
golem-cli --serve

# Start MCP server with custom port
golem-cli --serve --serve-port 8080

# Build with MCP feature enabled
cargo build --features mcp

/claim #1926

[AJ0070]

@noise64 @vigoo , could you please review this? I’m new to Golem and happy to iterate on the approach. Please let me know if anything doesn’t align with the direction you have in mind.

[noise64]

i will check it this week

[AJ0070]

@noise64 Would you be able to approve the CI tests?

[AJ0070]

@noise64 I've been away for a bit, but I'm currently investigating the CI failures.

[AJ0070]

@noise64, would you mind approving the CI tests again?