feat: Implement dark mode theme support across components

- Added ThemeContext for managing theme state and toggling between light and dark modes.
- Updated components (EntrepreneurshipSection, Footer, HeroSection, LeadershipSection, ReviewSection, TechSection, UniqueSection) to utilize theme context and apply conditional styling based on the current theme.
- Enhanced CSS with custom properties for theming and transitions.
- Configured Tailwind CSS to support dark mode.
- Ensured consistent styling and transitions for text and background colors in dark mode.

src/main.tsx

@@ -1,10 +1,13 @@
-import { StrictMode } from 'react'
-import { createRoot } from 'react-dom/client'
-import './index.css'
-import App from './App.tsx'
+import { StrictMode } from "react";
+import { createRoot } from "react-dom/client";
+import "./index.css";
+import App from "./App.tsx";
+import { ThemeProvider } from "./contexts/ThemeContext.tsx";
 
-createRoot(document.getElementById('root')!).render(
+createRoot(document.getElementById("root")!).render(
   <StrictMode>
-    <App />
-  </StrictMode>,
-)
+    <ThemeProvider>
+      <App />
+    </ThemeProvider>
+  </StrictMode>
+);