feat: add ComfyUI plugin

[williamxie1989]

Summary

Add comfyui/ plugin to manage ComfyUI servers from the CLI.

Commands

Command	Description
comfyui nodes	List all registered node types (700+)
comfyui node-info <name>	Detailed definition of a node (inputs, types, defaults, constraints)
comfyui search-node <query>	Search nodes by keyword
comfyui models [--model_type <type>]	List available model files
comfyui system-stats	Server status and system information
`comfyui run <json	file>`
comfyui queue	Queue status (running / pending)
comfyui history [--limit N]	Execution history

ComfyUI API Endpoints Used

Endpoint	Purpose
/api/object_info	List all node definitions
/api/models	List model directories
/api/models/<type>	List models of a type
/api/system_stats	Server information
/prompt	Queue a workflow for execution
/api/queue	Queue status
/api/history	Execution history

Configuration

Configurable via COMFYUI_HOST environment variable (default: http://127.0.0.1:8188).

export COMFYUI_HOST=http://192.168.1.100:8008

Test plan

• All 8 commands tested against a live ComfyUI server (macOS, Apple Silicon)
• comfyui nodes --limit 5 lists node types correctly
• comfyui node-info KSampler shows input definitions with types and defaults
• comfyui node-info NonExistentNode returns helpful error with similar suggestions
• comfyui search-node sampler finds matching nodes by name and field
• comfyui models shows summary per type; --model_type loras lists specific models
• comfyui system-stats returns ComfyUI version, OS, device, RAM
• comfyui queue shows empty queue / running / pending states
• comfyui history --limit 3 shows recent execution history
• comfyui history --prompt_id <id> shows specific entry details
• comfyui run <json> submits workflow, reports errors cleanly
• Error handling: invalid node, non-existent prompt_id, no-match search
• COMFYUI_HOST env var correctly configures server address

[Astro-Han]

I don’t think this is ready to merge yet. There are two integration problems that look blocking, plus one docs gap.

1. The new clis/comfyui/*.js files import ../../registry.js and ../../errors.js. That doesn’t match how adapters are wired in this repo. Existing adapters import from @jackwener/opencli/registry and @jackwener/opencli/errors, and I don’t see a root-level registry.js for these new files to resolve against.

2. The adapter is added as source .js files under clis/, but this repo’s build only compiles clis/**/*.ts. That means these ComfyUI handlers may behave differently in local dev versus the packaged build, and may be missing from dist/clis/ entirely.

3. For a new adapter, this repo asks for the adapter doc, adapter index, VitePress sidebar, README.md, and README.zh-CN.md in the same PR. This diff adds the adapter page and sidebar entry, but not the index or READMEs.

From my side, the feature itself makes sense and the scope is focused. I’d fix the import path and packaging issue first, then bring the docs updates in line with the repo’s adapter checklist.