Add the Support of creating independent classes/packages inside of Mod ID Package

It would be cool if it is possible to change the Custom Mod Element(For Coding) the location/Path where it should be created. It will also solve the Issue that you cannot create files in the Generated Package from MCreator without getting deleted by the Software.

For Example if my Mod Package is "net.mcreator.testmod" and create manually a file inside that Package for example a java file called "testfile":

• net > mcreator > testmod > api > testfile.java

Then if you build your mod etc. MCreator will delete the file "testfile.java" also delete the manually created folder "api".