Add xcode gitignore

Author: mlykotom

.gitignore

@@ -11,4 +11,17 @@ build
 .externalNativeBuild
 .idea/*
 /.idea/*
-.kotlin
+.kotlin
+
+### Xcode ###
+## User settings
+xcuserdata/
+
+### Xcode Patch ###
+*.xcodeproj/*
+!*.xcodeproj/project.pbxproj
+!*.xcodeproj/xcshareddata/
+!*.xcodeproj/project.xcworkspace/
+!*.xcworkspace/contents.xcworkspacedata
+/*.gcno
+**/xcshareddata/WorkspaceSettings.xcsettings