Function validate_and_repair_shell 

pub fn validate_and_repair_shell(
    shell: &mut Mesh,
    auto_repair: bool,
) -> (ShellValidationResult, Option<ShellRepairResult>)

Validate and optionally repair a shell mesh.

This is a convenience function that validates, attempts repair if needed, and re-validates.

Arguments

• shell - The shell mesh to validate and repair
• auto_repair - Whether to attempt automatic repair of minor issues

Returns

A tuple of (validation result, optional repair result).