lib/cli: add timing logs to query commands

lib/cli/commands/query_kanji.dart

@@ -29,12 +29,16 @@ class QueryKanji extends Command {
       libsqlitePath: argResults!.option('libsqlite')!,
     );
 
+    final time = Stopwatch()..start();
     final result = await JaDBConnection(db).searchKanji('漢');
+    time.stop();
 
     if (result == null) {
       print("No such kanji");
     } else {
       print(JsonEncoder.withIndent('  ').convert(result.toJson()));
     }
+
+    print("Query took ${time.elapsedMilliseconds}ms");
   }
 }

lib/cli/commands/query_word.dart

@@ -29,7 +29,9 @@ class QueryWord extends Command {
       libsqlitePath: argResults!.option('libsqlite')!,
     );
 
+    final time = Stopwatch()..start();
     final result = await JaDBConnection(db).searchWord('かな');
+    time.stop();
 
     if (result == null) {
       print("Invalid search");
@@ -39,5 +41,7 @@ class QueryWord extends Command {
       print(JsonEncoder.withIndent('  ')
           .convert(result.map((e) => e.toJson()).toList()));
     }
+
+    print("Query took ${time.elapsedMilliseconds}ms");
   }
 }