Summary: env zero adds ready-to-use policies

Why It Matters: This change makes it easier for users to set up security and cost rules. It helps them use the product faster.

What Changed:

• A new blog post was added about "Ready-to-Use Policies – Guardrails You Can Activate Instantly."
• The new policies help users enforce standards like blocking public S3 buckets, limiting costly EC2 instances, and tightening IAM permissions.
• The new policies are prebuilt, so users do not have to write them from scratch.