feat: Make Lucide icons globally available without Stimulus controller

- Replace unpkg CDN with npm package import in application.js
- Add global initialization for all Lucide icons on page load and Turbo events
- Remove dependency on lucide_controller.js and data-controller wrapper
- Icons now work anywhere with simple <i data-lucide="icon-name"></i> syntax
- Bundle size increased to include full icon set but removes controller overhead

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/views/layouts/application.html.erb

@@ -14,8 +14,7 @@
     <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
     <link href="https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Outfit:wght@400;500;600;700;800;900&display=swap" rel="stylesheet">
 
-    <!-- Lucide Icons -->
-    <script src="https://unpkg.com/lucide@latest/dist/umd/lucide.min.js"></script>
+    <!-- Lucide Icons loaded via npm package -->
 
     <%# Enable PWA manifest for installable apps (make sure to enable in config/routes.rb too!) %>
     <%#= tag.link rel: "manifest", href: pwa_manifest_path(format: :json) %>