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/utils/builtin_extensions.dart

@@ -1,62 +0,0 @@
-import 'dart:typed_data';
-
-import 'package:collection/collection.dart';
-
-extension DurationExtension on String {
-  Duration? toDuration() {
-    try {
-      final parts = split(':')
-          .map((e) => double.parse(e).toInt())
-          .toList(growable: false);
-      return Duration(hours: parts[0], minutes: parts[1], seconds: parts[2]);
-    } catch (e) {
-      return null;
-    }
-  }
-
-  double toDouble() {
-    return double.parse(this);
-  }
-
-  int toInt() {
-    return int.parse(this);
-  }
-}
-
-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;
-  }
-}