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/.vitepress/theme/style.css

@@ -405,3 +405,15 @@
   position: absolute;
   will-change: top;
 }
+
+/* Unified demo info-box label alignment */
+.vp-doc .info-box {
+  display: flex;
+  gap: 0.25rem;
+  align-items: flex-start;
+}
+
+.vp-doc .info-box strong {
+  white-space: nowrap;
+  flex-shrink: 0;
+}