add: 目标crud

src/main/java/com/dota/nexus/entity/R.java

@@ -0,0 +1,22 @@
+package com.dota.nexus.entity;
+
+import lombok.Data;
+
+@Data
+public class R {
+	private Integer code;
+	private String msg;
+	private Object data;
+
+	public static R ok() {
+		return ok(null);
+	}
+
+	public static R ok(Object data) {
+		var r = new R();
+		r.setCode(200);
+		r.setMsg("ok");
+		r.setData(data);
+		return r;
+	}
+}