Files domain - support for compose operations

[brandtkeller]

Is your feature request related to a problem? Please describe.

Given the purpose of the compose operations (defined in #715) - Lula will need the ability to integrate the files domain with processes that account for "packaging" files locally and mutating validations as required.

Describe the solution you'd like

• Given a component definition with validations implementing the files domain
• When compose is executed
• Then all associated files are co-located with the composed component definition

Describe alternatives you've considered

Require absolute path

Additional context

Missing Files - if a validation runs and a file cannot be located - we should handle this within the context of a single validation error

Expected Deliverable

• Files domain compose support
• Tests to indicate support for nested component-definitions / validations