refactor(role): refactor role management API and service

- Remove unused imports and simplify controller annotations
- Change request mapping path from /api/role to /api/roles
- Update assignRolesToUser endpoint to use POST /users
- Update revokeRolesFromUser endpoint to use DELETE /users
- Modify getAllRoles method to return OptionResponse instead of RoleResponse
- Simplify database query in RoleServiceImpl using lambda query wrapper
- Add proper authorization checks for all role management endpoints
- Remove redundant getUserRole method with duplicate logic

chaos_api_interface/src/main/java/cn/nopj/chaos_api/service/RoleService.java

@@ -1,5 +1,6 @@
 package cn.nopj.chaos_api.service;
 
+import cn.nopj.chaos_api.dto.response.OptionResponse;
 import cn.nopj.chaos_api.dto.response.RoleResponse;
 
 import java.util.List;
@@ -9,5 +10,5 @@ public interface RoleService {
      * 获取所有角色
      * @return 所有角色
      */
-    List<RoleResponse> getAllRoles();
+    List<OptionResponse> getAllRoles();
 }