update doc english part

docs/mkdocs.yml

@@ -8,6 +8,20 @@ nav:
   - 「    」: 'index.md'
   - English:
     - 'Start': 'en/index.md'
+    - 'Install Plugin': 'en/install-plugin.md'
+    - 'Configure Plugin': 'en/configure-plugin.md'
+    - 'Virtools Properties': 'en/virtools-properties.md'
+    - 'Import and Export Virtools Document': 'en/import-export-virtools.md'
+    - 'Group Operation': 'en/group-operations.md'
+    - 'Legacy Alignment': 'en/legacy-align.md'
+    - 'Naming Convention': 'en/naming-convention.md'
+    - 'UV Mapping': 'en/uv-mapping.md'
+    - 'Add Floor': 'en/bme-adder.md'
+    - 'Add Rail': 'en/rail-adder.md'
+    - 'Add Component': 'en/component-adder.md'
+    - 'Compile and Distribute Plugin': 'en/compile-distribute-plugin.md'
+    - 'Report Issue': 'en/report-bugs.md'
+    - 'Technical Information': 'en/tech-infos.md'
   - 简体中文:
     - '开始': 'zh-cn/index.md'
     - '安装插件': 'zh-cn/install-plugin.md'