refactor(ai): Implement unified model system with type-safe createLLM

- Add Model interface to types.ts with normalized structure
- Create type-safe generic createLLM function with provider-specific model constraints
- Generate models from OpenRouter API and models.dev data
- Strip provider prefixes for direct providers (google, openai, anthropic, xai)
- Keep full model IDs for OpenRouter-proxied models
- Clean separation: types.ts (Model interface), models.ts (factory logic), models.generated.ts (data)
- Remove old model scripts and unused dependencies
- Rename GeminiLLM to GoogleLLM for consistency
- Add tests for new providers (xAI, Groq, Cerebras, OpenRouter)
- Support 181 tool-capable models across 7 providers with full type safety

packages/ai/README.md

@@ -13,12 +13,12 @@ npm install @mariozechner/ai
 ```typescript
 import { AnthropicLLM } from '@mariozechner/ai/providers/anthropic';
 import { OpenAICompletionsLLM } from '@mariozechner/ai/providers/openai-completions';
-import { GeminiLLM } from '@mariozechner/ai/providers/gemini';
+import { GoogleLLM } from '@mariozechner/ai/providers/gemini';
 
 // Pick your provider - same API for all
 const llm = new AnthropicLLM('claude-sonnet-4-0');
 // const llm = new OpenAICompletionsLLM('gpt-5-mini');
-// const llm = new GeminiLLM('gemini-2.5-flash');
+// const llm = new GoogleLLM('gemini-2.5-flash');
 
 // Basic completion
 const response = await llm.complete({