feat(website): add Nerd Fonts for programming language icons

- Add Monaspace Argon NF font for dev icons
- Update cookbook.yml with unicode codepoints for language icons:
  - TypeScript: \uE628
  - Python: \uE73C
  - C#/.NET: \uF81A
  - Go: \uE626
- Style .lang-tab and .lang-indicator with Nerd Font family

website/public/data/manifest.json

@@ -1,5 +1,5 @@
 {
-  "generated": "2026-02-02T04:12:40.822Z",
+  "generated": "2026-02-02T04:25:59.396Z",
   "counts": {
     "agents": 145,
     "prompts": 138,

website/public/data/samples.json

@@ -10,25 +10,25 @@
         {
           "id": "nodejs",
           "name": "Node.js / TypeScript",
-          "icon": "🟢",
+          "icon": "",
           "extension": ".ts"
         },
         {
           "id": "python",
           "name": "Python",
-          "icon": "🐍",
+          "icon": "",
           "extension": ".py"
         },
         {
           "id": "dotnet",
           "name": ".NET (C#)",
-          "icon": "🟣",
+          "icon": "",
           "extension": ".cs"
         },
         {
           "id": "go",
           "name": "Go",
-          "icon": "🔵",
+          "icon": "",
           "extension": ".go"
         }
       ],

website/public/styles/global.css

@@ -5,6 +5,16 @@
    Orange 1: #F4A876  Orange 2: #F08A3A  Orange 3: #FE4C25
    Orange 4: #C53211  Orange 5: #801E0F  Orange 6: #500A00
 */
+
+/* Nerd Fonts for programming language icons */
+@font-face {
+  font-family: 'Monaspace Argon NF';
+  src: url('/fonts/MonaspaceArgonNF-Regular.woff2') format('woff2');
+  font-weight: 400;
+  font-style: normal;
+  font-display: swap;
+}
+
 :root {
   /* Dark theme (default) */
   --color-bg: #0d0d12;