Add relay server for remote HTTPS access

Node.js/TypeScript relay server that enables remote access to MacroPad:
- WebSocket-based communication between desktop and relay
- Password authentication with bcrypt hashing
- Session management with consistent IDs
- REST API proxying to desktop app
- Web client WebSocket relay
- Login page and PWA-ready app page
- Designed for cloud-node-container deployment

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

macropad-relay/src/index.ts

@@ -0,0 +1,21 @@
+// MacroPad Relay Server Entry Point
+
+import { createServer } from './server';
+import { config } from './config';
+import { logger } from './utils/logger';
+
+async function main() {
+  logger.info('Starting MacroPad Relay Server...');
+
+  const { server } = createServer();
+
+  server.listen(config.port, config.host, () => {
+    logger.info(`Server running on http://${config.host}:${config.port}`);
+    logger.info(`Environment: ${config.nodeEnv}`);
+  });
+}
+
+main().catch((error) => {
+  logger.error('Failed to start server:', error);
+  process.exit(1);
+});