feat: add trim in string op opposited with strip

benchmark/yycc/string/op.cpp

@@ -15,4 +15,12 @@ namespace yyccbench::string::op {
     }
     BENCHMARK(BM_StringStrip)->Name("StringStrip");
 
+    static void BM_StringTrim(benchmark::State& state) {
+        std::u8string_view strl = u8" \thello\r\n"sv, words = u8" \t\r\n"sv;
+        for (auto _ : state) {
+            auto rv = OP::trim(strl, words);
+        }
+    }
+    BENCHMARK(BM_StringTrim)->Name("StringTrim");
+
 }