Add API documentation and underground station importer

- Introduced a new HTML documentation page for the oradio API, including a JavaScript file to handle dynamic content and API requests.
- Added a CSS file for styling the documentation page.
- Implemented an underground station importer script that fetches data from Radio-Browser and writes it to a JSON file.
- Created a stats module to compute and manage vote and play statistics for radio stations.
- Added a polyfill for modulepreload to ensure compatibility with older browsers.

package.json

@@ -1,29 +1,29 @@
 {
-  "name": "online-radio-explorer",
-  "version": "0.1.0",
-  "private": true,
-  "type": "module",
-  "description": "Touchscreen kiosk + admin for exploring and playing internet radio.",
-  "scripts": {
-    "dev": "concurrently -k -n web,api -c blue,green \"npm:dev:web\" \"npm:dev:api\"",
-    "dev:web": "vite",
-    "dev:api": "node --watch server/index.js",
-    "build": "vite build",
-    "start": "node server/index.js",
-    "seed": "node server/scripts/seed.js"
-  },
-  "dependencies": {
-    "bcryptjs": "^2.4.3",
-    "better-sqlite3": "^11.3.0",
-    "cookie": "^1.0.1",
-    "dotenv": "^16.4.5",
-    "express": "^4.21.0",
-    "node-cron": "^3.0.3",
-    "ws": "^8.18.0"
-  },
-  "devDependencies": {
-    "concurrently": "^9.0.1",
-    "hls.js": "^1.5.17",
-    "vite": "^5.4.8"
-  }
-}
+    "name": "online-radio-explorer",
+    "version": "0.1.0",
+    "private": true,
+    "type": "module",
+    "description": "Touchscreen kiosk + admin for exploring and playing internet radio.",
+    "scripts": {
+        "dev": "concurrently -k -n web,api -c blue,green \"npm:dev:web\" \"npm:dev:api\"",
+        "dev:web": "vite",
+        "dev:api": "node --watch server/index.js",
+        "build": "vite build",
+        "start": "node server/index.js",
+        "seed": "node server/scripts/seed.js"
+    },
+    "dependencies": {
+        "bcryptjs": "^2.4.3",
+        "better-sqlite3": "^11.3.0",
+        "cookie": "^1.0.1",
+        "dotenv": "^16.4.5",
+        "express": "^4.21.0",
+        "node-cron": "^3.0.3",
+        "ws": "^8.18.0"
+    },
+    "devDependencies": {
+        "concurrently": "^9.0.1",
+        "hls.js": "^1.5.17",
+        "vite": "^5.4.8"
+    }
+}