feat: Initialize Turtle Control Center with React and WebSocket server

- Added index.html for the main entry point of the client application.
- Created package.json for client dependencies and scripts.
- Implemented App component with view controls and layout.
- Added CSS styles for the application and components.
- Developed ControlPanel component for turtle management and commands.
- Created Map3D component for 3D visualization of turtles.
- Established Zustand store for state management of turtles and WebSocket connection.
- Set up server with Express and WebSocket for handling turtle updates and commands.
- Added REST API endpoints for turtle status updates and command handling.
- Implemented start.sh script for setting up and running the application.

client/src/index.css

@@ -0,0 +1,25 @@
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+body {
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+  background: #0a0e1a;
+  color: #e0e0e0;
+  overflow: hidden;
+}
+
+#root {
+  width: 100vw;
+  height: 100vh;
+}
+
+code {
+  font-family: 'Courier New', monospace;
+}