refactor: migrate to Elysia and enhance security middleware

- Replaced Express with Elysia for improved performance and type safety
- Integrated Elysia middleware for rate limiting, security headers, and request validation
- Refactored security utilities to work with Elysia's context and request handling
- Updated token management and validation logic
- Added comprehensive security headers and input sanitization
- Simplified server initialization and error handling
- Updated documentation with new setup and configuration details

package.json

@@ -16,18 +16,14 @@
     "prepare": "husky install"
   },
   "dependencies": {
-    "@digital-alchemy/core": "^25.1.3",
-    "@digital-alchemy/hass": "^25.1.1",
-    "@jest/globals": "^29.7.0",
-    "@types/express": "^4.17.21",
-    "@types/jest": "^29.5.12",
+    "@elysiajs/cors": "^1.2.0",
+    "@elysiajs/swagger": "^1.2.0",
     "@types/jsonwebtoken": "^9.0.5",
     "@types/node": "^20.11.24",
     "@types/sanitize-html": "^2.9.5",
     "@types/ws": "^8.5.10",
     "dotenv": "^16.4.5",
-    "express": "^4.18.2",
-    "express-rate-limit": "^7.1.5",
+    "elysia": "^1.2.11",
     "helmet": "^7.1.0",
     "jsonwebtoken": "^9.0.2",
     "node-fetch": "^3.3.2",
@@ -52,4 +48,4 @@
   "engines": {
     "bun": ">=1.0.0"
   }
-}
+}