refactor(utils): extract query params builder, migrate health and location

packages/utils/lib/src/query_params_builder.dart

@@ -0,0 +1,25 @@
+import 'dart:convert';
+
+String encodeOrderBy(String field, {String direction = 'DESC'}) {
+  return base64Encode(
+    utf8.encode(
+      jsonEncode([
+        {'field': field, 'sortDirection': direction},
+      ]),
+    ),
+  );
+}
+
+String encodeFilters(List<Map<String, dynamic>> filters) {
+  return base64Encode(utf8.encode(jsonEncode(filters)));
+}
+
+String encodeFilter({
+  required String field,
+  required String operator,
+  required dynamic value,
+}) {
+  return encodeFilters([
+    {'field': field, 'operator': operator, 'value': value},
+  ]);
+}

packages/utils/lib/utils.dart

@@ -1,4 +1,5 @@
 export 'src/date_utils.dart';
 export 'src/duration_format.dart';
+export 'src/query_params_builder.dart';
 export 'src/size_utils.dart';
 export 'src/test.dart';