add gitignore

.gitignore

@@ -16,3 +16,32 @@ debian/stamp*
 debian/.debhelper
 debian/libopenmesh*
 obj-x86_64-linux-gnu
+# Created by https://www.toptal.com/developers/gitignore/api/cmake
+# Edit at https://www.toptal.com/developers/gitignore?templates=cmake
+
+### CMake ###
+CMakeLists.txt.user
+CMakeCache.txt
+CMakeFiles
+CMakeScripts
+Testing
+Makefile
+cmake_install.cmake
+install_manifest.txt
+compile_commands.json
+CTestTestfile.cmake
+_deps
+
+### CMake Patch ###
+CMakeUserPresets.json
+
+# External projects
+*-prefix/
+
+# End of https://www.toptal.com/developers/gitignore/api/cmake
+n
+
+build-headers
+build-ios
+build-macos
+build-xcframework