reminders + locale: draw prefs/reminders and language plumbing from floret-kit

Consume two newly extracted floret-kit modules and drop the in-app copies:

- core-reminders: ReminderUnit / decomposeReminderMinutes, the ReminderOverride
  model and the override codec. SettingsPrefs keeps its own DataStore wiring and
  Agendula's ':' codec dialect; ReminderFormatting/ReminderLeadPicker keep the
  app's R.string labels and presets.
- core-locale: AppLanguage. Deleted the app copy; SettingsScreen now passes
  R.xml.locales_config to supportedTags().

Bumps the floret-kit submodule to include both modules.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/build.gradle.kts

@@ -121,6 +121,8 @@ dependencies {
     implementation(libs.kotlinx.datetime)
     implementation(libs.kotlinx.coroutines.core)
     implementation("de.jeanlucmakiola.floret:core-time")
+    implementation("de.jeanlucmakiola.floret:core-reminders")
+    implementation("de.jeanlucmakiola.floret:core-locale")
     implementation("de.jeanlucmakiola.floret:core-crash")
     implementation("de.jeanlucmakiola.floret:identity")
     implementation("de.jeanlucmakiola.floret:components")