feat: doubao seedream text to image plugin

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Pull Request Overview

This PR introduces a new Doubao Seedream text-to-image plugin that integrates with the Doubao AI service to generate images from text prompts.

• Adds a complete tool package for Doubao Seedream image generation with configurable parameters
• Implements TypeScript interfaces with Zod validation for input/output types
• Provides comprehensive configuration with multilingual support and various image size options

Reviewed Changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
modules/tool/packages/seedream1/package.json	Package configuration for the new Seedream tool
modules/tool/packages/seedream1/index.ts	Main entry point that exports the tool with configuration
modules/tool/packages/seedream1/src/index.ts	Core implementation with API integration and type definitions
modules/tool/packages/seedream1/config.ts	Detailed tool configuration with UI controls and multilingual labels
modules/tool/packages/seedream1/test/index.test.ts	Basic test suite for tool structure validation

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