Split libquassel out from quasseldroid

...uassel/messages/testutil/testHandshakeSerializerDirect.kt

...assel/messages/testutil/testHandshakeSerializerEncoded.kt

libquassel-messages/src/test/resources/quasseltest.crt

libquassel-messages/src/test/resources/quasseltest.key

libquassel-protocol/build.gradle.kts

libquassel-protocol/gradle.properties

...tjanne/libquassel/protocol/connection/ConnectionHeader.kt

...quassel/protocol/connection/ConnectionHeaderSerializer.kt

...stjanne/libquassel/protocol/connection/ProtocolFeature.kt

.../justjanne/libquassel/protocol/connection/ProtocolInfo.kt

.../libquassel/protocol/connection/ProtocolInfoSerializer.kt

.../justjanne/libquassel/protocol/connection/ProtocolMeta.kt

.../libquassel/protocol/connection/ProtocolMetaSerializer.kt

...stjanne/libquassel/protocol/connection/ProtocolVersion.kt

...a/de/justjanne/libquassel/protocol/features/FeatureSet.kt

...e/justjanne/libquassel/protocol/features/LegacyFeature.kt

.../justjanne/libquassel/protocol/features/QuasselFeature.kt

...ava/de/justjanne/libquassel/protocol/io/ByteBufferUtil.kt

.../de/justjanne/libquassel/protocol/io/ChainedByteBuffer.kt

...java/de/justjanne/libquassel/protocol/io/StringEncoder.kt