feat: 添加项目文件和客户文件类型服务类

添加 ProjectFileTypeService 和 CompanyCustomerFileTypeService 服务类，用于处理文件和客户类型相关逻辑

server/src/main/java/com/ecep/contract/ds/customer/service/CompanyCustomerFileTypeService.java

@@ -0,0 +1,4 @@
+package com.ecep.contract.ds.customer.service;
+
+public class CompanyCustomerFileTypeService {
+}

server/src/main/java/com/ecep/contract/ds/project/service/ProjectFileTypeService.java

@@ -0,0 +1,4 @@
+package com.ecep.contract.ds.project.service;
+
+public class ProjectFileTypeService {
+}