refactor(代码生成): 默认的模块名为:admin

config.json 配置文件的默认模块名修改为 admin

(cherry picked from commit 520ee19fcd45d29e9a38b197417532d870de4531)

pigx-visual/pigx-codegen/src/main/resources/template/config.json

@@ -2,7 +2,7 @@
   "project": {
     "packageName": "com.pig4cloud.pigx",
     "version": "1.0.0",
-    "backendPath": "pigx",
+    "backendPath": "admin",
     "frontendPath": "pigx-ui"
   },
   "developer": {