Migrate to AndroidX ViewModel from Voyager ScreenModel (#3594)

core/viewmodel/src/main/AndroidManifest.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest />

core/viewmodel/src/main/kotlin/mihon/core/viewmodel/StateViewModel.kt

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+package mihon.core.viewmodel
+
+import androidx.lifecycle.ViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+
+abstract class StateViewModel<S>(initialState: S) : ViewModel() {
+    protected val mutableState: MutableStateFlow<S> = MutableStateFlow(initialState)
+    val state: StateFlow<S> = mutableState.asStateFlow()
+}