feat(docs): add interactive demos and complete content for development tools

- Add Vue components for interactive demos (SSH auth, regex, env vars, ports)
- Complete markdown content for SSH, regex, environment variables, and ports
- Remove placeholder "待实现" sections and replace with detailed guides
- Add visual explanations for key concepts like ports and localhost
- Include practical examples and troubleshooting tips
- Add component for showing evolution from transistors to CPU
- Improve documentation structure and navigation
- Add security best practices for API keys and environment variables

docs/zh-cn/appendix/index.md

@@ -64,11 +64,6 @@
     title="命令行与 Shell 脚本"
     description="终端操作、Shell 命令、脚本自动化"
   />
-<NavCard
-    href="/zh-cn/appendix/2-development-tools/editors-and-ai"
-    title="编辑器与 AI 编程助手"
-    description="AI 时代的编辑器使用方式与效率提升技巧"
-  />
 <NavCard
     href="/zh-cn/appendix/2-development-tools/git-version-control"
     title="Git：代码的时光机"