feat(third_party): add oatpp,googltest,benchmark

third_party/googletest/LICENSE

@@ -0,0 +1,28 @@
+Copyright 2008, Google Inc.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
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+distribution.
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+
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