add gitignore file

.gitignore

@@ -0,0 +1,49 @@
+# Mac OS X
+.DS_Store
+
+# Xcode
+
+## Build generated
+build/
+DerivedData
+Output/
+
+## Various settings
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata
+
+## Other
+*.xccheckout
+*.moved-aside
+*.xcuserstate
+*.xcscmblueprint
+
+## Pod
+Podfile.lock
+Pods
+*.xcworkspace
+
+## Obj-C/Swift specific
+*.hmap
+*.ipa
+
+## Playgrounds
+timeline.xctimeline
+playground.xcworkspace
+
+# Swift Package Manager
+.build/
+
+# Carthage
+Carthage/Build
+
+# Commit comments
+CHANGELOG_COMMIT.text
+