feat: init SwiftUI library for FirebaseAuthSwiftUI

Author: russellwheatley

FirebaseSwiftUI/FirebaseAuthSwiftUI/.gitignore

@@ -0,0 +1,8 @@
+.DS_Store
+/.build
+/Packages
+xcuserdata/
+DerivedData/
+.swiftpm/configuration/registries.json
+.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+.netrc

FirebaseSwiftUI/FirebaseAuthSwiftUI/Package.swift

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+// swift-tools-version: 6.0
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "FirebaseAuthSwiftUI",
+    products: [
+        // Products define the executables and libraries a package produces, making them visible to other packages.
+        .library(
+            name: "FirebaseAuthSwiftUI",
+            targets: ["FirebaseAuthSwiftUI"]),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package, defining a module or a test suite.
+        // Targets can depend on other targets in this package and products from dependencies.
+        .target(
+            name: "FirebaseAuthSwiftUI"),
+        .testTarget(
+            name: "FirebaseAuthSwiftUITests",
+            dependencies: ["FirebaseAuthSwiftUI"]
+        ),
+    ]
+)

FirebaseSwiftUI/FirebaseAuthSwiftUI/Sources/FirebaseAuthSwiftUI/FirebaseAuthSwiftUI.swift

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+// The Swift Programming Language
+// https://docs.swift.org/swift-book

FirebaseSwiftUI/FirebaseAuthSwiftUI/Tests/FirebaseAuthSwiftUITests/FirebaseAuthSwiftUITests.swift

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+import Testing
+@testable import FirebaseAuthSwiftUI
+
+@Test func example() async throws {
+    // Write your test here and use APIs like `#expect(...)` to check expected conditions.
+}