Simple Wrapping of gtest

A repo that i can add gtest to a extisting c++ project with zig buildsystem using zig package manager (0.11.x)

Submodule doesn't seem to be exported when using commit snapshots Based of https://github.com/google/googletest/tree/d1467f5813f4d363cfd11aba99c4e9fe47a85e99