feat: unp4k data forge support

lib/data/dcb_data.dart

@@ -0,0 +1,24 @@
+/// DCB 记录项数据
+class DcbRecordData {
+  final String path;
+  final int index;
+
+  const DcbRecordData({required this.path, required this.index});
+}
+
+/// DCB 搜索匹配数据
+class DcbSearchMatchData {
+  final int lineNumber;
+  final String lineContent;
+
+  const DcbSearchMatchData({required this.lineNumber, required this.lineContent});
+}
+
+/// DCB 搜索结果数据
+class DcbSearchResultData {
+  final String path;
+  final int index;
+  final List<DcbSearchMatchData> matches;
+
+  const DcbSearchResultData({required this.path, required this.index, required this.matches});
+}