@spec print_explanation(module(), MetaCredo.Issue.t() | nil, atom() | nil) :: :ok

Prints explanation for a check module.

When issue is provided (typically from a file:lineno invocation), the relevant code snippet is shown first, ±3 lines around the flagged line.

language controls which language-keyed examples entry is rendered. When nil, the examples section is omitted entirely.

@spec print_report(map()) :: :ok

Prints the full analysis report to stdout.

@spec to_json(map()) :: String.t()

Formats issues as JSON string.