feat(config): 添加配置数据种子和根据key查询配置功能

- 添加初始密码配置项的种子数据 (sys.user.initPassword: 123456)
- 在 ConfigService 中新增 GetConfigKeyAsync 方法支持根据key查询配置值

Yi.Abp.Net8/module/rbac/Yi.Framework.Rbac.Application/Services/ConfigService.cs

@@ -1,3 +1,4 @@
+using Microsoft.AspNetCore.Mvc;
 using SqlSugar;
 using Volo.Abp.Application.Dtos;
 using Volo.Abp.Application.Services;
@@ -61,5 +62,18 @@ namespace Yi.Framework.Rbac.Application.Services
                 throw new UserFriendlyException(ConfigConst.Exist);
             }
         }
+        
+        /// <summary>
+        /// 根据key查配置
+        /// </summary>
+        /// <param name="key"></param>
+        /// <returns></returns>
+        ///
+        [Route("config/config-key/{configKey}")]
+        public async Task<string> GetConfigKeyAsync(string configKey)
+        {
+            var entity = await _repository.GetAsync(x => x.ConfigKey == configKey);
+            return entity.ConfigValue;
+        }
     }
 }