feat: 新增多个服务类及工具类，重构部分代码结构

重构服务类结构，将分散的服务统一整合到service包下
新增ProjectConstant常量类及多个实体服务类
添加SecurityUtils安全工具类和BeanCacher工具类
优化部分UI控件和转换器的实现

client/src/main/java/com/ecep/contract/service/CompanyCustomerService.java

@@ -27,4 +27,9 @@ public class CompanyCustomerService implements ViewModelService<CompanyCustomer,
     public File getBasePath() {
         throw new UnsupportedOperationException("Unimplemented method 'getBasePath'");
     }
+
+    public boolean makePathAbsent(CompanyCustomer companyCustomer) {
+        // TODO Auto-generated method stub
+        throw new UnsupportedOperationException("Unimplemented method 'makePathAbsent'");
+    }
 }