Undo project structure changes

...assel/protocol/testutil/testPrimitiveSerializerVariant.kt

...in/de/justjanne/libquassel/protocol/types/SignedIdTest.kt

...tjanne/libquassel/protocol/util/collections/InsertTest.kt

...ustjanne/libquassel/protocol/util/collections/MoveTest.kt

...stjanne/libquassel/protocol/util/collections/PairsTest.kt

...tjanne/libquassel/protocol/util/collections/RemoveTest.kt

...janne/libquassel/protocol/util/expansion/ExpansionTest.kt

...ibquassel/protocol/util/expression/ExpressionMatchTest.kt

.../de/justjanne/libquassel/protocol/variant/QVariantTest.kt

libquassel-protocol/src/test/resources/blns.txt

settings.gradle.kts