Filter out run and debug contextual menu when the file doesn't contain a Main

Run and debug contextual menu are available on files that cannot be run or debug. it would be better to not provide the menu. it will allow having a lighter contextual menu, do nto give false hope to end-users and avoid an error notifications when clicking on it

Environment

• Operating System:
• JDK version:
• Visual Studio Code version:
• Java extension version:
• Java Debugger extension version:

Steps To Reproduce

1. create a java file which does not contain a Main class
2. right-click on it

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Current Result

Expected Result

Additional Informations