Draft: Resolve "Update documentation for cosign verify to account for using cosign 2.0"

Update documentation for cosign verify to account for using cosign 2.0

This MR updates the cosign documentation to reflect the changes introduced in version 2.0. The documentation has been revised to include new features, updated configuration instructions, and usage examples. The goal of this update is to provide clear and concise guidance on how to use the latest version of cosign, making it easier for users to adopt and benefit from its improved capabilities.