feat: 会员中心 hgcloud 主题初始化 + drone 部署步骤

- 解压官方默认主题 default_yfMBA.tar.gz 到 clientarea/hgcloud/
- .gitignore 排除压缩包和临时解压目录
- drone 新增步骤: 同步 hgcloud 到 /clientarea/template/pc/

clientarea/hgcloud/css/index.css

@@ -0,0 +1,36 @@
+*{
+  margin: 0;
+  padding: 0;
+}
+.el-header, .el-footer {
+    background-color: #B3C0D1;
+    color: #333;
+    text-align: center;
+    line-height: 60px;
+  }
+  
+  .el-aside {
+    background-color: #1E41C9;
+    text-align: center;
+    height: 100vh;
+  }
+  
+  .el-main {
+    background-color: #E9EEF3;
+    color: #333;
+    text-align: center;
+    line-height: 160px !important;
+  }
+  
+  body > .el-container {
+    margin-bottom: 40px;
+  }
+  
+  .el-container:nth-child(5) .el-aside,
+  .el-container:nth-child(6) .el-aside {
+    line-height: 260px;
+  }
+  
+  .el-container:nth-child(7) .el-aside {
+    line-height: 320px;
+  }