feat(mobile): exclude locales from overpass font (#14158)

* feat(mobile): create localeProvider

This provider can be used to refresh providers that provide UI elements
and get cached.

* feat(mobile): use default font for locales not supported by Overpass

* chore(mobile): fix test

* refactor(mobile): use Locale instead of String

mobile/lib/utils/immich_app_theme.dart

@@ -2,6 +2,7 @@ import 'package:dynamic_color/dynamic_color.dart';
 import 'package:flutter/material.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:immich_mobile/constants/immich_colors.dart';
+import 'package:immich_mobile/constants/locales.dart';
 import 'package:immich_mobile/extensions/theme_extensions.dart';
 import 'package:immich_mobile/providers/app_settings.provider.dart';
 import 'package:immich_mobile/services/app_settings.service.dart';
@@ -145,7 +146,18 @@ ImmichTheme _decolorizeSurfaces({
   );
 }
 
-ThemeData getThemeData({required ColorScheme colorScheme}) {
+String? getFontFamilyFromLocale(Locale locale) {
+  if (localesNotSupportedByOverpass.contains(locale)) {
+    // Let Flutter use the default font
+    return null;
+  }
+  return 'Overpass';
+}
+
+ThemeData getThemeData({
+  required ColorScheme colorScheme,
+  required Locale locale,
+}) {
   var isDark = colorScheme.brightness == Brightness.dark;
   var primaryColor = colorScheme.primary;
 
@@ -163,10 +175,10 @@ ThemeData getThemeData({required ColorScheme colorScheme}) {
     bottomSheetTheme: BottomSheetThemeData(
       backgroundColor: colorScheme.surfaceContainer,
     ),
-    fontFamily: 'Overpass',
+    fontFamily: getFontFamilyFromLocale(locale),
     snackBarTheme: SnackBarThemeData(
       contentTextStyle: TextStyle(
-        fontFamily: 'Overpass',
+        fontFamily: getFontFamilyFromLocale(locale),
         color: primaryColor,
         fontWeight: FontWeight.bold,
       ),
@@ -175,7 +187,7 @@ ThemeData getThemeData({required ColorScheme colorScheme}) {
     appBarTheme: AppBarTheme(
       titleTextStyle: TextStyle(
         color: primaryColor,
-        fontFamily: 'Overpass',
+        fontFamily: getFontFamilyFromLocale(locale),
         fontWeight: FontWeight.bold,
         fontSize: 18,
       ),