Introducing Secrets and Environment Variables to Cloudflare Workers

Introduced Secrets and Environment Variables for Cloudflare Workers. Secrets are encrypted upon saving and never visible to users, addressing high-stakes use cases like API keys. Environment Variables are stored in plain text for simpler configuration. Both are accessible via the Wrangler CLI and Workers Dashboard. The feature was designed based on user research and usability testing, leading to adjustments in terminology (e.g., 'KV namespace binding') and UI separation of KV bindings from other environment variables.