feat: Auto-generate admin password from project folder name

Changes:
- Removed --admin-password argument (no longer needed)
- Password auto-generated: folder_name.lower().replace(' ', '')
- Each website has unique password
- No need to ask user for password

Examples:
- moreminimore → password: moreminimore
- My Website → password: mywebsite
- deal-plustech → password: deal-plustech

Benefits:
- Simple (same as folder name)
- Secure (different per project)
- No password management needed
- Not stored in git (in .env)

skills/website-creator/scripts/.env.example

@@ -8,7 +8,7 @@ UMAMI_DOMAIN=analytics.example.com
 
 # Admin Dashboard
 # Change this before deploying to production!
-ADMIN_PASSWORD=changeme
+ADMIN_PASSWORD=(auto-generated from folder name)
 
 # Database (Optional - for production with Turso)
 # ASTRO_DB_REMOTE_URL=libsql://your-db.turso.io