feat(breaks): Implement break functionality with Break entity and adapter

apps/mobile/packages/domain/lib/src/adapters/shifts/break/break_adapter.dart

@@ -0,0 +1,39 @@
+import '../../../entities/shifts/break/break.dart';
+
+/// Adapter for Break related data.
+class BreakAdapter {
+  /// Maps break data to a Break entity.
+  ///
+  /// [isPaid] whether the break is paid.
+  /// [breakTime] the string representation of the break duration (e.g., 'MIN_10', 'MIN_30').
+  static Break fromData({
+    required bool isPaid,
+    required String? breakTime,
+  }) {
+    return Break(
+      isBreakPaid: isPaid,
+      duration: _parseDuration(breakTime),
+    );
+  }
+
+  static BreakDuration _parseDuration(String? breakTime) {
+    if (breakTime == null) return BreakDuration.none;
+
+    switch (breakTime.toUpperCase()) {
+      case 'MIN_10':
+        return BreakDuration.ten;
+      case 'MIN_15':
+        return BreakDuration.fifteen;
+      case 'MIN_20':
+        return BreakDuration.twenty;
+      case 'MIN_30':
+        return BreakDuration.thirty;
+      case 'MIN_45':
+        return BreakDuration.fortyFive;
+      case 'MIN_60':
+        return BreakDuration.sixty;
+      default:
+        return BreakDuration.none;
+    }
+  }
+}