feat: Initial commit.

.gitignore

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+.DS_Store
+/.build
+/Packages
+xcuserdata/
+DerivedData/
+.swiftpm/configuration/registries.json
+.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+.netrc

Package.swift

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+// swift-tools-version: 6.2
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "swift-manual-d",
+    products: [
+        // Products define the executables and libraries a package produces, making them visible to other packages.
+        .library(
+            name: "swift-manual-d",
+            targets: ["swift-manual-d"]
+        ),
+    ],
+    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: "swift-manual-d"
+        ),
+        .testTarget(
+            name: "swift-manual-dTests",
+            dependencies: ["swift-manual-d"]
+        ),
+    ]
+)

Sources/swift-manual-d/swift_manual_d.swift

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

Tests/swift-manual-dTests/swift_manual_dTests.swift

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