docs: Update project structure and roadmap for streaming support

Author: ericc-ch

docs/project-structure.md

@@ -25,9 +25,10 @@ This document outlines the structure and organization of the Copilot API project
 │   ├── api-instance.ts  # API client configurations
 │   └── copilot/
 │       ├── chat-completions/
-│       │   ├── service.ts        # Chat completion service
-│       │   ├── types.ts          # Chat completion types
-│       │   └── types.streaming.ts # Streaming response types
+│       │   ├── service.ts           # Chat completion service
+│       │   ├── service-streaming.ts # Streaming chat completion service
+│       │   ├── types.ts            # Chat completion types
+│       │   └── types-streaming.ts  # Streaming response types
 │       └── get-models/
 │           ├── service.ts        # Model retrieval service
 │           └── types.ts          # Model-related types

docs/roadmap.md

@@ -21,10 +21,10 @@
   - [ ] Implement vision API endpoints
   - [ ] Handle image uploads and processing
   - [ ] Convert between Copilot and OpenAI vision formats
-- [ ] Implement true streaming responses
-  - [ ] Server-sent events (SSE) support
-  - [ ] Streaming chat completions
-  - [ ] Proper error handling for streams
+- [x] Implement true streaming responses
+  - [x] Server-sent events (SSE) support
+  - [x] Streaming chat completions
+  - [x] Proper error handling for streams
 
 ## Build Instructions