Landing page: Interactive execution widget

[cuevaio]

Description

Build a rate-limited "try it now" code runner on the landing page, similar to Firecrawl/Exa.

Features

• Predefined code examples (simple and complex)
• Live execution against real exec0 backend
• Strict rate limits for unauthenticated usage
• Clear output display

Tasks

• Design interactive code editor component
• Create predefined example snippets
• Implement rate limiting for trial executions
• Wire up to exec0 backend
• Track usage through logging/billing pipeline (tagged as "trial")
• Add execution status indicators
• Handle errors gracefully with user-friendly messages

Rate Limiting

• Define limits (e.g., X requests per IP per hour)
• Show remaining quota to users
• Prompt to sign up when limit reached

Acceptance Criteria

• Visitors can try exec0 without signing up
• Executions are properly rate limited
• Trial usage is tracked in the same pipeline
• Experience encourages sign-up for full access