feat: add network mode with combined HTTP and SSE endpoints

- Add new 'network' transport mode that serves both HTTP and SSE endpoints simultaneously
- HTTP endpoint available on specified port (/mcp)
- SSE endpoint available on port+1 (/sse)
- Maintain backward compatibility with stdio, http, sse modes
- Update documentation and examples for new network mode
- Default to network mode for improved user experience

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -133,20 +133,16 @@ To configure the MCP server for Gitea, add the following to your MCP configurati
 }
 ```
 
-- **sse mode**
+- **network mode** (provides both HTTP and SSE endpoints)
 
-```json
-{
-  "mcpServers": {
-    "gitea": {
-      "url": "http://localhost:8080/sse"
-    }
-  }
-}
+Start the server in network mode:
+```bash
+gitea-mcp -t network --host https://gitea.com --token <your-token> --port 8080
 ```
 
-- **http mode**
+Then configure your MCP client with either endpoint:
 
+**HTTP endpoint:**
 ```json
 {
   "mcpServers": {
@@ -157,6 +153,17 @@ To configure the MCP server for Gitea, add the following to your MCP configurati
 }
 ```
 
+**SSE endpoint:**
+```json
+{
+  "mcpServers": {
+    "gitea": {
+      "url": "http://localhost:8081/sse"
+    }
+  }
+}
+```
+
 **Default log path**: `$HOME/.gitea-mcp/gitea-mcp.log`
 
 > [!NOTE]