Update Gitignore file

.gitignore

@@ -0,0 +1,44 @@
+CMakeLists.txt.user
+CMakeLists_modified.txt
+
+Examples/RGB-D/rgbd_tum
+
+Examples/Monocular/mono_euroc
+Examples/Monocular/mono_kitti
+Examples/Monocular/mono_tum
+Examples/Monocular/mono_tum_vi
+
+Examples/Stereo/stereo_euroc
+Examples/Stereo/stereo_kitti
+Examples/Stereo/stereo_tum_vi
+
+Examples/Monocular-Inertial/mono_inertial_euroc
+Examples/Monocular-Inertial/mono_inertial_tum_vi
+
+Examples/Stereo-Inertial/stereo_inertial_euroc
+Examples/Stereo-Inertial/stereo_inertial_tum_vi
+
+Examples/ROS/ORB_SLAM3/Mono
+Examples/ROS/ORB_SLAM3/MonoAR
+Examples/ROS/ORB_SLAM3/RGBD
+Examples/ROS/ORB_SLAM3/Stereo
+
+Examples/ROS/ORB_SLAM3/CMakeLists.txt.user
+Examples/ROS/ORB_SLAM3/build/
+
+KeyFrameTrajectory.txt
+CameraTrajectory.txt
+kf_*.txt
+f_*.txt
+Thirdparty/DBoW2/build/
+Thirdparty/DBoW2/lib/
+Thirdparty/g2o/build/
+Thirdparty/g2o/config.h
+Thirdparty/g2o/lib/
+Vocabulary/ORBvoc.txt
+build/
+
+lib/
+
+cmake_modules/
+cmake-build-debug/