fix: Remove Arduino entry points

Improved flexibility by removing the Arduino entry points in favor of manual calls to setup/loop that the user can call from their entry point.  This is the more common use case for Arudino.

Also added the gtest/gmock_main files to the PlatformIO ignore list since we are not supporting that feature.

googlemock/include/gmock/gmock.h

@@ -92,6 +92,22 @@ GTEST_API_ void InitGoogleMock(int* argc, char** argv);
 // UNICODE mode.
 GTEST_API_ void InitGoogleMock(int* argc, wchar_t** argv);
 
+#ifdef ARDUINO
+inline void gmock_setup() {
+  // Since Arduino doesn't have a command line, fake out the argc/argv arguments
+  int argc = 1;
+  const auto arg0 = "PlatformIO";
+  char* argv0 = const_cast<char*>(arg0);
+  char** argv = &argv0;
+
+  // Since Google Mock depends on Google Test, InitGoogleMock() is
+  // also responsible for initializing Google Test.  Therefore there's
+  // no need for calling testing::InitGoogleTest() separately.
+  testing::InitGoogleMock(&argc, argv);
+}
+inline void gmock_loop() { RUN_ALL_TESTS(); }
+#endif
+
 }  // namespace testing
 
 #endif  // GMOCK_INCLUDE_GMOCK_GMOCK_H_