docs(core): add little note about props locale

core/src/androidMain/kotlin/moe/lava/neon/core/api/ApiConstants.android.kt

@@ -5,6 +5,8 @@ import java.util.Locale
 @Suppress("ConstantLocale")
 internal actual val platformSuperProps = PlatformProps(
     device = android.os.Build.DEVICE,
+    // TODO: this only outputs language but not country (e.g. en instead of en-AU)
+    // .toLanguageTag() is close, but returns too much junk (e.g. en-AU-u-fw-mon)
     systemLocale = Locale.getDefault().language,
     osVersion = "${android.os.Build.VERSION.SDK_INT}",
 )