Xcode project setup (#1)

This PR contains the work done to setup the *Xcode* project, with its `.gitignore` and `.swift-format` files.

Reviewed-on: rock-n-code/loud-amsterdam#1
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>

.gitignore

@@ -0,0 +1,54 @@
+# macOS
+.DS_Store
+.AppleDouble
+.LSOverride
+Icon
+._*
+
+# Xcode
+## User settings
+xcuserdata/
+
+## Build generated
+build/
+DerivedData/
+
+## Various settings
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+
+## Other
+*.moved-aside
+*.hmap
+*.ipa
+*.dSYM.zip
+*.dSYM
+
+## Playgrounds
+timeline.xctimeline
+playground.xcworkspace
+
+# Swift Package Manager
+## Build output and resolved dependency checkouts
+.build/
+## SwiftPM's local registry config and per-user Xcode data (schemes live in
+## xcuserdata, already ignored above). Shared .swiftpm metadata is committed.
+.swiftpm/configuration/registries.json
+.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+
+# NOTE: `Packages/` is intentionally NOT ignored — it holds this repo's local
+# Swift packages (source), not checked-out dependencies.
+# NOTE: `Package.resolved` is intentionally NOT ignored — committing it locks
+# dependency versions across the team and CI.
+
+# Fastlane
+fastlane/report.xml
+fastlane/Preview.html
+fastlane/screenshots/**/*.png
+fastlane/test_output