trivial language injection works

build.gradle.kts

src/main/grammar/JastAddAspect.bnf

src/main/grammar/JastAddAspect.flex

.../org/jastadd/tooling/aspect/JastAddAspectElementType.java

...in/java/org/jastadd/tooling/aspect/JastAddAspectFile.java

...ava/org/jastadd/tooling/aspect/JastAddAspectFileType.java

...ava/org/jastadd/tooling/aspect/JastAddAspectLanguage.java

...jastadd/tooling/aspect/JastAddAspectParserDefinition.java

...va/org/jastadd/tooling/aspect/JastAddAspectTokenType.java

.../org/jastadd/tooling/aspect/JastAddAttributeFileType.java

...org/jastadd/tooling/aspect/JavaBlockLanguageInjector.java

...stadd/tooling/aspect/lexer/JastAddAspectLexerAdapter.java

...d/tooling/aspect/psi/JastAddAspectJavaBlockExtension.java

.../aspect/psi/impl/JastAddAspectJavaBlockImplExtension.java

src/main/resources/META-INF/plugin.xml