chore: sanitize template names and descriptions

- Renamed 'Artificial Intelligence' to 'Neural Network'
- Renamed 'Blockchain Protocol' to 'Secure Protocol'
- Renamed 'Crypto Futurism' to 'Digital Futurism'
- Renamed 'Startup SaaS' to 'Product Launch'
- Renamed 'Tech Startup' to 'Tech Venture'
- Removed references to AI, crypto, blockchain, and startups from template descriptions
- Updated README.md to remove specific startup/SaaS references

src-tauri/templates/tech/crypto-futurism.json

@@ -1,8 +1,8 @@
 {
     "id": "crypto-futurism",
-    "name": "Crypto Futurism",
+    "name": "Digital Futurism",
     "category": "tech",
-    "description": "Cutting-edge design for blockchain and cryptocurrency content. Dark themes with electric accents.",
+    "description": "Cutting-edge design for digital finance and future tech content. Dark themes with electric accents.",
     "vibe": "Futuristic, Digital, Cutting-edge",
     "googleFontsImport": "https://fonts.googleapis.com/css2?family=Audiowide&family=Rajdhani:wght@400;500;600;700&display=swap",
     "typography": {