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/lib/widgets/album/album_action_filled_button.dart

@@ -0,0 +1,43 @@
+import 'package:flutter/material.dart';
+import 'package:immich_mobile/extensions/build_context_extensions.dart';
+
+class AlbumActionFilledButton extends StatelessWidget {
+  final VoidCallback? onPressed;
+  final String labelText;
+  final IconData iconData;
+
+  const AlbumActionFilledButton({
+    super.key,
+    this.onPressed,
+    required this.labelText,
+    required this.iconData,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.only(right: 16.0),
+      child: FilledButton.icon(
+        style: FilledButton.styleFrom(
+          padding: const EdgeInsets.symmetric(vertical: 0, horizontal: 10),
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(25),
+          ),
+          backgroundColor: context.colorScheme.surfaceContainerHigh,
+        ),
+        icon: Icon(
+          iconData,
+          size: 18,
+          color: context.primaryColor,
+        ),
+        label: Text(
+          labelText,
+          style: context.textTheme.labelMedium?.copyWith(
+            fontWeight: FontWeight.w600,
+          ),
+        ),
+        onPressed: onPressed,
+      ),
+    );
+  }
+}