feat: port all template categories to JSON format

- Ported Minimalist templates to JSON (Swiss Grid, Brutalist, etc.)
- Ported Tech templates to JSON (SaaS, Terminal, Cyberpunk, etc.)
- Ported Creative templates to JSON (Art Gallery, Zine, Pop Art, etc.)
- Ported Industrial templates to JSON (Blueprint, Factory, Schematic, etc.)
- Ported Nature templates to JSON (Botanical, Ocean, Mountain, etc.)
- Ported Lifestyle templates to JSON (Cookbook, Travel, Coffee House, etc.)
- Ported Vintage templates to JSON (Art Deco, Medieval, Retro 80s, etc.)
- Updated README.md to reflect the new JSON-based style system (example configuration and contribution workflow)
- Completed migration of over 150 styles to the new architecture

src/styles/templates/lifestyle/bistro-chalkboard.ts

@@ -0,0 +1,36 @@
+import { StyleOption } from '../../../types';
+
+export const bistroChalkboard: StyleOption = {
+    id: 'bistro-chalkboard',
+    name: 'Bistro Chalkboard',
+    category: 'Food',
+    description: 'French cafe menu. White chalk text on slate black.',
+    vibe: 'French, Food, Chalk',
+    googleFontsImport: 'https://fonts.googleapis.com/css2?family=Homemade+Apple&family=Caveat:wght@400;700&display=swap',
+    wordConfig: {
+      heading1: { 
+        font: "Homemade Apple", size: 32, color: "FFFFFF", bold: false, align: 'center',
+        spacing: { before: 400, after: 200, line: 240 },
+        shading: { fill: "212121", color: "auto", style: "clear" }
+      },
+      heading2: { 
+        font: "Caveat", size: 20, color: "E0E0E0", bold: true, align: 'center',
+        spacing: { before: 320, after: 160, line: 240 }
+      },
+      body: { 
+        font: "Caveat", size: 14, color: "BDBDBD", align: 'center',
+        spacing: { before: 0, after: 160, line: 280 },
+        shading: { fill: "263238", color: "auto", style: "clear" }
+      },
+      accentColor: "FFFFFF"
+    },
+    previewCss: `
+      font-family: 'Caveat', cursive;
+      background: #212121;
+      color: #FFFFFF;
+      h1 { font-family: 'Homemade Apple', cursive; font-size: 32pt; color: #FFFFFF; text-align: center; margin-bottom: 24px; border-bottom: 1px solid #757575; padding-bottom: 12px; }
+      h2 { font-size: 20pt; font-weight: 700; color: #E0E0E0; text-align: center; margin-top: 32px; margin-bottom: 16px; }
+      p { font-size: 14pt; line-height: 1.5; color: #BDBDBD; margin-bottom: 14px; text-align: center; }
+      blockquote { border: 1px dashed #FFFFFF; padding: 16px; margin: 24px 0; font-style: italic; text-align: center; }
+    `
+  };