Reorganize modules to add a fuzz target

...justjanne/libquassel/generator/kotlinmodel/KotlinModel.kt

...ne/libquassel/generator/kotlinmodel/KotlinModelVisitor.kt

...in/de/justjanne/libquassel/generator/rpcmodel/RpcModel.kt

...ustjanne/libquassel/generator/rpcmodel/RpcModelVisitor.kt

...stjanne/libquassel/generator/util/kotlinpoet/ArgString.kt

.../libquassel/generator/util/kotlinpoet/WhenBlockBuilder.kt

...stjanne/libquassel/generator/util/kotlinpoet/buildWhen.kt

...tjanne/libquassel/generator/util/kotlinpoet/withIndent.kt

...de/justjanne/libquassel/generator/util/ksp/asClassName.kt

...tlin/de/justjanne/libquassel/generator/util/ksp/asType.kt

.../de/justjanne/libquassel/generator/util/ksp/asTypeName.kt

...e/libquassel/generator/util/ksp/findAnnotationWithType.kt

...ibquassel/generator/util/ksp/getClassDeclarationByName.kt

...n/de/justjanne/libquassel/generator/util/ksp/getMember.kt

.../justjanne/libquassel/generator/util/ksp/hasAnnotation.kt

...tlin/de/justjanne/libquassel/generator/util/ksp/toEnum.kt

...n/de/justjanne/libquassel/generator/util/transformName.kt

...anne/libquassel/generator/visitors/KSDeclarationParser.kt

...de/justjanne/libquassel/generator/visitors/KotlinSaver.kt

...tjanne/libquassel/generator/visitors/RpcModelProcessor.kt