**Refactor:** Restructure server package to streamline imports and improve file organization

- Moved `providers`, `services`, `models`, `lib`, and related files to `src` directory within `server` package.
- Adjusted imports across the codebase to reflect the new paths.
- Renamed several `.ts` files for consistency.
- Introduced an `index.ts` in the `ai/providers` package to export all providers.

This improves maintainability and aligns with the project's updated directory structure.

packages/ai/providers/fireworks.ts

@@ -0,0 +1,65 @@
+import { OpenAI } from 'openai';
+
+import { ProviderRepository } from './_ProviderRepository.ts';
+import { BaseChatProvider, type CommonProviderParams } from './chat-stream-provider.ts';
+
+export class FireworksAiChatProvider extends BaseChatProvider {
+  getOpenAIClient(param: CommonProviderParams): OpenAI {
+    return new OpenAI({
+      apiKey: param.env.FIREWORKS_API_KEY,
+      baseURL: ProviderRepository.OPENAI_COMPAT_ENDPOINTS.fireworks,
+    });
+  }
+
+  getStreamParams(param: CommonProviderParams, safeMessages: any[]): any {
+    let modelPrefix = 'accounts/fireworks/models/';
+    if (param.model.toLowerCase().includes('yi-')) {
+      modelPrefix = 'accounts/yi-01-ai/models/';
+    }
+
+    return {
+      model: `${modelPrefix}${param.model}`,
+      messages: safeMessages,
+      stream: true,
+    };
+  }
+
+  async processChunk(chunk: any, dataCallback: (data: any) => void): Promise<boolean> {
+    if (chunk.choices && chunk.choices[0]?.finish_reason === 'stop') {
+      dataCallback({ type: 'chat', data: chunk });
+      return true;
+    }
+
+    dataCallback({ type: 'chat', data: chunk });
+    return false;
+  }
+}
+
+export class FireworksAiChatSdk {
+  private static provider = new FireworksAiChatProvider();
+
+  static async handleFireworksStream(
+    param: {
+      openai: OpenAI;
+      systemPrompt: any;
+      preprocessedContext: any;
+      maxTokens: number;
+      messages: any;
+      model: any;
+      env: any;
+    },
+    dataCallback: (data) => void,
+  ) {
+    return this.provider.handleStream(
+      {
+        systemPrompt: param.systemPrompt,
+        preprocessedContext: param.preprocessedContext,
+        maxTokens: param.maxTokens,
+        messages: param.messages,
+        model: param.model,
+        env: param.env,
+      },
+      dataCallback,
+    );
+  }
+}