feat: warn when dev server listens on a restricted port

If the port assigned to the Vite dev server is categorised as restricted
by browsers (e.g. port 6000), a warning is now displayed in the console
to prevent accessibility issues.

tsconfig.json

@@ -0,0 +1,12 @@
+{
+  "compilerOptions": {
+    "target": "es2016",
+    "module": "commonjs",
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "skipLibCheck": true,
+    "outDir": "dist"
+  },
+  "include": ["src"]
+}