Add typemanagement refactoring test bundle scaffold

[retryoos]

• What: New org.eclipse.fordiac.ide.typemanagement.tests test plugin with JUnit 5 and a disabled prototype for rename refactoring tests.
• Why: Provides a dedicated place for upcoming automated tests for org.eclipse.fordiac.ide.typemanagement.refactoring (rename/move/copy/delete).
• Next steps: Add fixture projects and executable tests for STRUCT datatype rename and FB type rename (including undo/redo + marker checks).

[azoitl]

@retryoos thx for starting this new test. There are two things that I kindly ask to consider:

1. please check our contribution guide in the 4diac documentationon our web-page. There you find an explanation on the Eclipse contribution process and the eclipse contribution agreement that you need to sign so that we can accept your contribution.
2. we have a set of standard java settings (e.g., clean-ups, warnings) that we have in every project. Please have look at the .settings directory of the org.eclipse.fordiac.ide to copy the relevant files and add them here.

[oberlehner]

Please also look at the build.properties from /org.eclipse.fordiac.ide.test.model and adjust them accordingly to your plugin
.