Update Make attributes internal to avoid conflicts

[ChrisPulman]

What kind of change does this PR introduce?

fix update

What is the current behavior?

attributes are public

What is the new behavior?

attributes are now internal to avoid inter library conflicts all packages are private to the source generators therefore have no direct dependencies

What might this PR break?

anyone using the attributes from sub-assemblies will no longer be able to access the attributes

Please check if the PR fulfills these requirements

• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

Other information:

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