[Feature]: Allow custom license header for app code

[eriksven]

Description

Among other things, the pre-commit task checks that all relevant files in the repoisoty contain the license header defined in license-header.txt . For the files provided by Eclipse Velocitas project that are not touched by a user of the template this might be ok. However, for the application in app/src a developer most likely wants to set another copyright notice or even other license.
So there should be a way to do this without having the pre-commit check failing or rewriting the license header to header from Eclipse Velocitas project.

Suggested Solution

Allow the definition of a second license file which is only enforced for files in app/src.

Alternatives

• Disable the license check at all, at least for the app directory
• Enable the license check only for *.py files and thus only for the application. This assumes that the repository does not contain any other *.py files maintained by the Eclipse Velocitas team.

Additional Context

No response

[kse3hi]

Thank you @eriksven for feature request. We will consider it.