feat: initialize frontend with React and Vite setup

- Added React and Vite configuration files.
- Created main entry point for the application.
- Included global CSS styles for theming and layout.
- Added SVG assets for React and Vite logos.

octofit-tracker/frontend/vite.config.js

@@ -0,0 +1,11 @@
+import { defineConfig } from 'vite'
+import react from '@vitejs/plugin-react'
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [react()],
+  server: {
+    port: 5173,
+    strictPort: true,
+  },
+})