NCP-3 add usercontent crud's,dto,exception and start restcontroller

src/main/java/ru/soune/no_copy/controller/UserContentController.java

@@ -0,0 +1,11 @@
+package ru.soune.no_copy.controller;
+
+import lombok.AllArgsConstructor;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController("api/content")
+@RequestMapping("api/content")
+@AllArgsConstructor
+public class UserContentController {
+}