feat: add initial frontend setup with styles, types, and testing framework

- Created a global CSS file for styling the frontend with responsive design.
- Introduced TypeScript types for various entities including Research, Alpha, and Account.
- Implemented Playwright tests for account management and data synchronization workflows.
- Configured TypeScript with strict settings and included necessary libraries.
- Set up Vite as the build tool with React plugin and API proxy configuration.
- Added a Python script to initialize environment variables securely.

Caddyfile

@@ -0,0 +1,18 @@
+{$SITE_ADDRESS:http://:80} {
+	encode zstd gzip
+	header {
+		X-Content-Type-Options nosniff
+		Referrer-Policy no-referrer
+		X-Frame-Options DENY
+		Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; font-src 'self' data:; connect-src 'self'; frame-ancestors 'none'; base-uri 'self'; form-action 'self'"
+		-Server
+	}
+	handle /api/* {
+		reverse_proxy backend:8000
+	}
+	handle {
+		root * /srv
+		try_files {path} /index.html
+		file_server
+	}
+}