首次提交：初始化项目代码

internal/router/api_im.go

@@ -0,0 +1,12 @@
+package router
+
+import "github.com/gin-gonic/gin"
+
+func (r *Router) setupIMRoutes(api *gin.RouterGroup) {
+	imGroup := api.Group("/im")
+	{
+		imGroup.GET("/ws", r.imHandler.WebSocket)
+		imGroup.POST("/chat", r.imHandler.Chat)
+		imGroup.POST("/chat/stream", r.imHandler.ChatStream)
+	}
+}