refactor(代码生成): 删除 config.json 配置，默认属性从配置文件中获取

json -> YAML

(cherry picked from commit 021e7435e294c874d1032d38411db17051ae75c5)

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

@@ -1,12 +0,0 @@
-{
-  "project": {
-    "packageName": "com.pig4cloud.pigx",
-    "version": "1.0.0",
-    "backendPath": "pigx",
-    "frontendPath": "pigx-ui"
-  },
-  "developer": {
-    "author": "pig",
-    "email": "sw@pigx.vip"
-  }
-}