Maintanance and added IsNull method

[coenm]

• Remove CanHandleMultipleRepositories() method from interface,
• Changed signature Enumerable<RepositoryActionBase> IActionToRepositoryActionMapper.Map(RepositoryAction action, IEnumerable<Repository> repository, ActionMapperComposition actionMapperComposition) from IEnumerable<Repository> to single Repository.
• using more and more of IRepository instead of Repository
• Bugfix in loading repository specific configuration. Wrong file was loaded.
• New method: IsNullMethod (ie IsNull(..) to be used in actions.
• Add logging to measure the time of loading the context menu

[sonarqubecloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

20.0% Coverage
0.0% Duplication

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