add sample code

Author: zunda-pixel

README.md

@@ -1,3 +1,92 @@
 # firebaseanalytics-swift
 
-Firebase Analytics client for Swift.
+> This Project is under development
+
+Firebase Analytics Client for Swift.
+
+```swift
+let clientInformation: ClientInformation = .init(
+  os: "ios",
+  osVersion: "18.3",
+  deviceModel: "iPhone17,3",
+  locale: "ja-jp",
+  localeId: 540,
+  installMethod: "manual_install",
+  bundleId: "com.apple.SampleApp",
+  appVersion: "1.0",
+  googleAppId: "1:21332412389:ios:11681asd2a3cd5d8"
+)
+
+let session: Session = .init(
+  firstInteraction: false,
+  firstOpenTime: 1_737_550_800_666,
+  nonPersonalizedAds: false,
+  sessionId: 1_737_555_666,
+  sessionNumber: 2,
+  lifetimeEngagement: 1_175_666,
+  sessionEngagement: 10055,
+  userId: "user-id"
+)
+
+let payload = Payload(
+  value: 1,
+  events: [
+    EventPayload(
+      eventName: "login",
+      parameters: [
+        .method: "Google",
+        .platform: "app",
+      ],
+      previousTimestampMillis: UInt(Date.now.timeIntervalSince1970 * 100),
+      timestampMillis: UInt(Date.now.timeIntervalSince1970 * 100)
+    ),
+    EventPayload(
+      eventName: "_e",
+      parameters: [
+        "_et": .uint(891),
+        .platform: "auto"
+      ],
+      previousTimestampMillis: UInt(Date.now.timeIntervalSince1970 * 100),
+      timestampMillis: UInt(Date.now.timeIntervalSince1970 * 100)
+    ),
+  ],
+  sessionInformations: session.parameters,
+  value4: UInt(Date.now.timeIntervalSince1970 * 100), // upload_timestamp_millis
+  value5: UInt(Date.now.timeIntervalSince1970 * 100), // start_timestamp_millis
+  value6: UInt(Date.now.timeIntervalSince1970 * 100), // end_timestamp_millis
+  value7: UInt(Date.now.timeIntervalSince1970 * 100), // previous_bundle_end_timestamp_millis
+  os: clientInformation.os,
+  osVersion: clientInformation.osVersion,
+  deviceModel: clientInformation.deviceModel,
+  value11: clientInformation.locale,
+  value12: clientInformation.localeId,
+  installMethod: clientInformation.installMethod,
+  bundleId: clientInformation.bundleId,
+  appVersion: clientInformation.appVersion,
+  value17: 110700, // gmp_version
+  value18: 110700, // uploading_gmp_version
+  value21: "BC75E87831231231B7A179248F24080C",  // fix // app_instance_id
+  value23: 25,  // count up // bundle_sequential_index
+  googleAppId: clientInformation.googleAppId,
+  value26: UInt(Date.now.timeIntervalSince1970 * 100),  // free // previous_bundle_start_timestamp_millis
+  value27: "CAIIJF38-E407-4954-BC16-F693A22F9FA9",  // fix // resettable_device_id
+  value30: "d4Xw8qsfsadBoMYlsYHnot",  // fix // firebase_instance_id
+  value31: 1, // app_version_major
+  value35: 1_727_127_969_769_945,  // fix // config_version
+  value45: 42_820_019,  // fix
+  value52: "G1--",  // fix // consent_signals
+  value64: "google_signals",  // fix
+  value71: "19911",  // fix // consent_diagnostics
+  value72: 0,  // fix
+  value77: 13  // count up
+)
+
+let analytics = Analytics(
+  httpClient: .urlSession(.shared),
+  userAgent: "SampleApp/1 CFNetwork/3826.400.120 Darwin/24.3.0",
+  clientInformation: clientInformation,
+  session: session
+)
+
+try await analytics.log(payload: payload)
+```