Add overview doc for Chainguard EKS add-ons - #3233

Changed pages include:

• chainguard/fips/eks-add-ons/index.html - view
• open-source/wolfi/building-a-wolfi-package/index.html - view
• open-source/build-tools/apko/bazel-rules/index.html - view
• open-source/sigstore/policy-controller/how-to-install-policy-controller/index.html - view
• open-source/sigstore/policy-controller/policies/chainguard-enforce-policy-examples/index.html - view
• open-source/sigstore/policy-controller/policies/chainguard-enforce-rego-policies/index.html - view
• open-source/sigstore/policy-controller/policies/critical-cve-policy/index.html - view
• open-source/sigstore/policy-controller/policies/disallowing-non-default-capabilities-with-policy-controller/index.html - view
• open-source/sigstore/policy-controller/policies/disallowing-privileged-containers-with-policy-controller/index.html - view
• open-source/sigstore/policy-controller/policies/disallowing-run-as-root-user-with-policy-controller/index.html - view

There are more changes not included in the list