fix: make sure IMT classes form correct discriminated union

[skvelymake]

Overview

Refactor IMT classes to form discriminated unions

Changes

• Refactor IMTAggregator to use a readonly type property instead of constructor initialization
• Change IMTHITL from abstract to concrete class and implement a default execute method throwing an error
• Refactor IMTTransformer to use a discriminated type union property instead of constructor initialization
• Add a new test file module-type.spec.ts to verify that ModuleType is a correctly discriminated union through instance checks
• Bump package version from 2.5.0 to 2.5.1

CDM-12098

[make-coverage]

Unit Test Coverage Report

Metric	master	ms/correct-discriminated-union-based-on-type-property	Status
Statements	85.54%	85.13%	💔
Branches	46.15%	45.35%	💔
Functions	66.07%	64.86%	💔

[github-actions]

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_{Generated 21. 10. 2024 22:24:08 GMT+2 for 2bd9aad}