Refactor Templatelookup package

[medmes]

Description

The template_lookup package contains methods and logic for handling module templates and converting them into Module objects(DTOs). While refactoring the AvailableModule into ModuleInfo type for better clarity (as outlined in #1638), it became evident that further improvements could be made to enhance the overall readability and usability of the template_lookup package.

Specifically, the Parser struct, and its methods, such as GenerateModulesFromTemplates and GenerateMandatoryModulesFromTemplates, have significant room for optimization. These methods currently combine responsibilities such as resolving templates, creating manifests, and handling errors, leading to complex and less maintainable code.

Proposed Improvement

Acceptance Criteria

• Refactor templatelookup pacakge:
  • Add UnManaged field into the moduleinfo struct (ModuleInfo_test.go)
• Refactor the Parser struct and its methods for better modularity, readability, and maintainability.
• Introduce meaningful naming conventions for all DTOs and helper functions.
• Provide documentation or comments for new/refactored methods.