fix: 调整分页从0开始

src/main/java/com/xydl/cac/controller/BasicController.java

@@ -9,10 +9,10 @@ public abstract class BasicController {
 
     protected Integer initPageNum(Integer pageNum) {
         if (pageNum == null) {
-            pageNum = 1;
+            pageNum = 0;
         }
-        if (pageNum < 1) {
-            pageNum = 1;
+        if (pageNum < 0) {
+            pageNum = 0;
         }
         return pageNum;
     }