Unique identifier for each rules

Thanks for the great tool to codify EKS best practices! It would be great to associate a unique identifier with each rules as it would help to track new findings & close findings related to a specific rule's assessment. e.g., for IAM rule `disable_anonymous_access_for_cluster_roles`, it can be assigned with an assessment id that follows pattern --. If this pattern is agreeable, I can submit a PR to implement the same.

No files, tests, or entry points are named. Start by locating the Python rule definitions and the assessment results that identify findings, then clarify the proposed identifier format and uniqueness requirements. Done means every rule has a stable unique identifier that appears wherever its assessment is reported.

Written by the indexing model from the issue text.