feat: add LLM provider factory

packages/llm/src/providers/factory.ts

@@ -0,0 +1,15 @@
+import type { LLMProviderConfig } from "@codeboard/shared";
+import type { LLMProvider } from "./base.js";
+import { OpenAIProvider } from "./openai.js";
+import { AnthropicProvider } from "./anthropic.js";
+
+export function createProvider(config: LLMProviderConfig): LLMProvider {
+  switch (config.provider) {
+    case "openai":
+      return new OpenAIProvider(config.apiKey, config.model, config.baseUrl);
+    case "anthropic":
+      return new AnthropicProvider(config.apiKey, config.model);
+    default:
+      throw new Error(`Unknown LLM provider: ${config.provider}`);
+  }
+}