feat: initialize frontend with React, Vite, and Tailwind CSS

- Added package.json for project dependencies and scripts.
- Configured PostCSS with Tailwind CSS.
- Created main application structure with App component and routing.
- Implemented API client for handling requests with Axios.
- Developed authentication API for login, logout, and user verification.
- Created entities API for managing virtual entities.
- Implemented logs API for fetching dispatch logs.
- Added navigation bar component for app navigation.
- Created protected route component for route guarding.
- Set up global CSS with Tailwind directives.
- Configured main entry point for React application.
- Developed basic Dashboard and Login pages.
- Set up router for application navigation.
- Added Jest testing setup for testing library.
- Configured Tailwind CSS with content paths.
- Set TypeScript configuration for frontend.
- Created Vite configuration for development and production builds.
- Added Nginx configuration for serving the application and proxying API requests.

backend/src/test/kotlin/com/condado/newsletter/CondadoApplicationTests.kt

@@ -0,0 +1,15 @@
+package com.condado.newsletter
+
+import org.junit.jupiter.api.Test
+import org.springframework.boot.test.context.SpringBootTest
+import org.springframework.test.context.ActiveProfiles
+
+@SpringBootTest
+@ActiveProfiles("dev")
+class CondadoApplicationTests {
+
+    @Test
+    fun contextLoads() {
+        // Verifies that the Spring application context starts up without errors.
+    }
+}