Add Xcode/Swift entries to .gitignore and untrack xcuserstate

- Add standard Xcode, Swift Package Manager, CocoaPods, Carthage,
  fastlane, and debug symbol ignore rules
- Remove tracked UserInterfaceState.xcuserstate file from index

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: jonathanpeppers

.gitignore

@@ -399,3 +399,64 @@ FodyWeavers.xsd
 
 # JetBrains Rider
 *.sln.iml
+
+## ---- Xcode / Swift ----
+## Get latest from https://github.com/github/gitignore/blob/main/Swift.gitignore
+
+# Xcode
+build/
+DerivedData/
+*.moved-aside
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata/
+*.xccheckout
+*.xcscmblueprint
+
+# Xcode workspaces
+*.xcworkspace
+!*.xcworkspace/contents.xcworkspacedata
+!*.xcworkspace/xcshareddata/
+/*.gcno
+
+# Swift Package Manager
+.build/
+Packages/
+Package.pins
+Package.resolved
+*.xcodeproj
+!*.xcodeproj/project.pbxproj
+!*.xcodeproj/xcshareddata/
+
+# CocoaPods
+Pods/
+
+# Carthage
+Carthage/Build/
+Carthage/Checkouts/
+
+# Accio dependency manager
+Dependencies/
+.accio/
+
+# fastlane
+fastlane/report.xml
+fastlane/Preview.html
+fastlane/screenshots/**/*.png
+fastlane/test_output
+
+# Swift Playgrounds
+timeline.xctimeline
+playground.xcworkspace
+
+# Swift Package Manager / Xcode
+.swiftpm/
+*.ipa
+*.dSYM.zip
+*.dSYM