refactor(prefs): create the settings store through DataStore.Builder

The store is now built through DataStore.Builder instead of the
preferencesDataStore delegate.

gradle/libs.versions.toml

@@ -4,7 +4,7 @@ activity_compose = "1.13.0"
 agp = "9.4.1"
 compose_bom = "2026.09.00"
 core = "1.19.1"
-datastore_preferences = "1.2.1"
+datastore_preferences = "1.3.0"
 documentfile = "1.1.0"
 kotlin = "2.4.21"
 lifecycle_runtime_ktx = "2.11.0"