feat: implement a simple version of the message renderer

...c/main/kotlin/de/justjanne/quasseldroid/ui/theme/Color.kt

...c/main/kotlin/de/justjanne/quasseldroid/ui/theme/Shape.kt

...c/main/kotlin/de/justjanne/quasseldroid/ui/theme/Theme.kt

...rc/main/kotlin/de/justjanne/quasseldroid/ui/theme/Type.kt

...n/kotlin/de/justjanne/quasseldroid/util/FlowExtensions.kt

...uasseldroid/util/lifecycle/ContextualLifecycleObserver.kt

...roid/util/lifecycle/DefaultContextualLifecycleObserver.kt

.../justjanne/quasseldroid/util/lifecycle/LifecycleStatus.kt

...lin/de/justjanne/quasseldroid/util/saver/BufferIdSaver.kt

...n/de/justjanne/quasseldroid/util/saver/IdentityIdSaver.kt

...kotlin/de/justjanne/quasseldroid/util/saver/MsgIdSaver.kt

...in/de/justjanne/quasseldroid/util/saver/NetworkIdSaver.kt

.../justjanne/quasseldroid/util/saver/TextFieldValueSaver.kt

app/src/main/kotlin/irc/CRCUtils.kt

app/src/main/kotlin/irc/SenderColorUtil.kt

...ku/justjanne/quasseldroid/util/irc/SenderColorUtilTest.kt

gradle/convention/src/main/kotlin/justjanne.java.gradle.kts

...ntion/src/main/kotlin/justjanne.kotlin.android.gradle.kts

...le/convention/src/main/kotlin/justjanne.kotlin.gradle.kts