Add dynamic template attribute rendering to lucide tag

[wilczynskiwm]

This PR adds support for dynamic attribute rendering in the lucide template tag.

What changed

• Added takes_context=True to enable access to template context
• Implemented template syntax detection in attribute values
• Added safe rendering with fallback for syntax errors

Example usage

{% lucide "user" class="{{user_class}}" data-id="{{user.id}}" %}