v0.3.0 — stdio transport + doc polish

Added

• --stdio flag and MCP_TRANSPORT=stdio env — speak MCP over stdio for stdio-first clients (Claude Desktop, mcp-inspector). HTTP remains the default.
• Glama listing: comfyui-mcp on glama.ai.

Improved

• All tool descriptions rewritten to cover behavior, side effects, return shape, and when to use each tool vs. alternatives.

See CHANGELOG.md for full history.