refactor(mobile): build context extensions (#4923)

* refactor: move all extensions to separate package

* refactor(mobile): add BuildContext extension

* refactor(mobile): use theme getters from context

* refactor(mobile): use media query size from context

* refactor(mobile): use auto router methods from context

* refactor(mobile): use navigator methods from context

---------

Co-authored-by: shalong-tanwen <139912620+shalong-tanwen@users.noreply.github.com>

mobile/lib/extensions/collection_extensions.dart

@@ -0,0 +1,41 @@
+import 'dart:typed_data';
+
+import 'package:collection/collection.dart';
+
+extension ListExtension<E> on List<E> {
+  List<E> uniqueConsecutive({
+    int Function(E a, E b)? compare,
+    void Function(E a, E b)? onDuplicate,
+  }) {
+    compare ??= (E a, E b) => a == b ? 0 : 1;
+    int i = 1, j = 1;
+    for (; i < length; i++) {
+      if (compare(this[i - 1], this[i]) != 0) {
+        if (i != j) {
+          this[j] = this[i];
+        }
+        j++;
+      } else if (onDuplicate != null) {
+        onDuplicate(this[i - 1], this[i]);
+      }
+    }
+    length = length == 0 ? 0 : j;
+    return this;
+  }
+
+  ListSlice<E> nestedSlice(int start, int end) {
+    if (this is ListSlice) {
+      final ListSlice<E> self = this as ListSlice<E>;
+      return ListSlice<E>(self.source, self.start + start, self.start + end);
+    }
+    return ListSlice<E>(this, start, end);
+  }
+}
+
+extension IntListExtension on Iterable<int> {
+  Int64List toInt64List() {
+    final list = Int64List(length);
+    list.setAll(0, this);
+    return list;
+  }
+}