move common code into common package

src/main/grammar/Aspect.bnf

src/main/grammar/Grammar.bnf

...rg/jastadd/tooling/aspect/psi/JastAddAspectAttribute.java

...psi/impl/JastAddAspectAspectDeclarationImplExtension.java

...tAddAspectAspectInhAttributeDeclarationImplExtension.java

...tAddAspectAspectSynAttributeDeclarationImplExtension.java

...spect/psi/impl/JastAddAspectAstTypeNameImplExtension.java

.../impl/JastAddAspectClassOrInterfaceTypeImplExtension.java

...i/impl/JastAddAspectCollectionAttributeImplExtension.java

...ain/java/org/jastadd/tooling/common/psi/NamedElement.java

...org/jastadd/tooling/common/psi/impl/NamedElementImpl.java

...g/grammar/psi/impl/GrammarComponentNameImplExtension.java

...ooling/grammar/psi/impl/GrammarTypeDeclImplExtension.java

...ooling/grammar/psi/impl/GrammarTypeNameImplExtension.java