feat(mobile): add support for material themes (#11560)

* feat(mobile): add support for material themes

Added support for custom theming and updated all elements accordingly.

* fix(mobile): Restored immich brand colors to default theme

* fix(mobile): make ListTile titles bold in settings main page

* feat(mobile): update bottom nav and appbar colors

* small tweaks

---------

Co-authored-by: Alex <alex.tran1502@gmail.com>

mobile/pubspec.yaml

@@ -61,9 +61,11 @@ dependencies:
   octo_image: ^2.0.0
   thumbhash: 0.1.0+1
   async: ^2.11.0
+  dynamic_color: ^1.7.0 #package to apply system theme
 
   #image editing packages
   crop_image: ^1.0.13
+
   openapi:
     path: openapi