feat: Add Hummingbot plugin

[SumeetChougule]

Relates to:

No specific issue - This is a new plugin contribution

Risks

Low - This plugin is self-contained within its own package and doesn't modify any existing functionality. The only integration point is through the plugin system which is designed for extensibility.

Background

What does this PR do?

Adds a new Hummingbot plugin that enables Eliza agents to perform automated market making and trading operations. The plugin provides:

• Real-time market data streaming via WebSocket
• Simple market making strategy with configurable parameters
• Order lifecycle management (create, cancel, track)
• Inventory skew management
• Type-safe configuration and error handling

What kind of change is this?

Features (non-breaking change which adds functionality)

Documentation changes needed?

My changes do not require a change to the project documentation as the plugin includes its own comprehensive README.md with installation, configuration, and usage instructions.

Testing

Where should a reviewer start?

1. Review the plugin's architecture in packages/plugin-hummingbot/src/index.ts
2. Check the market making strategy implementation in packages/plugin-hummingbot/src/strategies/simple-market-making.ts
3. Review type definitions and configuration interface in packages/plugin-hummingbot/src/types.ts

Detailed testing steps

1. Install dependencies with pnpm install
2. Configure Hummingbot instance details in your character config:

{
  "plugins": ["@eliza/plugin-hummingbot"],
  "settings": {
    "HUMMINGBOT_CONFIG": {
      "instance": {
        "url": "http://localhost:15888",
        "apiKey": "your-api-key"
      }
    }
  }
}

[samarth30]

Hi @SumeetChougule ,

Could you push your changes after taking the latest pull to ensure everything is up to date?

Also, it would be great if you could replace references to @ai16z with @elizaOS and update @elizaos/eliza to @elizaos/core to avoid any potential errors in the code.

Additionally, could you integrate your Hummingbot plugin into agent/src/index.ts, following the structure of other plugins? Lastly, don’t forget to include your .env configurations in the .env.example file for consistency.