feat: persist local configuration and device identity (#3)

Store receiver and identity together in Keychain, with versioned tracking
preferences, explicit authorization retry and stable Settings focus.
Adopt free Apple Development locally and credential-free ad hoc CI.
Run configuration and focus tests through both CI toolchains.

Final decisions: https://github.com/jayanezj/traccar-client-macos/issues/3#issuecomment-6396087703

scripts/test.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+set -euo pipefail
+
+build_root="${1:?Usage: scripts/test.sh /absolute/path/to/external/build-directory}"
+case "$build_root" in
+    /*) ;;
+    *) echo "The build directory must be an absolute path." >&2; exit 2 ;;
+esac
+repo_root="$(cd "$(dirname "$0")/.." && pwd)"
+source "$repo_root/scripts/signing-options.sh"
+mkdir -p "$build_root/TestResults"
+result_root="$(mktemp -d "$build_root/TestResults/run.XXXXXX")"
+
+echo "Test results: $result_root/Configuration.xcresult"
+exec xcodebuild \
+    -project "$repo_root/TraccarClient.xcodeproj" \
+    -scheme TraccarClient \
+    -configuration Debug \
+    -destination 'platform=macOS,arch=arm64' \
+    -parallel-testing-enabled NO \
+    -derivedDataPath "$build_root/DerivedData" \
+    -resultBundlePath "$result_root/Configuration.xcresult" \
+    "CLANG_MODULE_CACHE_PATH=$build_root/ModuleCache" \
+    "SWIFT_MODULE_CACHE_PATH=$build_root/ModuleCache" \
+    "${signing_options[@]}" \
+    test