Add “Using in your project” section to readme

Author: florianpircher

README.md

@@ -1,3 +1,31 @@
 # Swift Scoped File Path
 
 A Swift package introducing separate `AbsoluteFilePath` and `RelativeFilePath` based on `FilePath` from [Swift System](https://github.com/apple/swift-system).
+
+## Using Swift Scoped File Path in your project
+
+Add `swift-scoped-file-path` as a dependency to your package:
+
+```swift
+let package = Package(
+	// ...
+	dependencies: [
+		.package(url: "https://github.com/Formkunft/swift-scoped-file-path", .upToNextMajor(from: "0.2.0")),
+	],
+	targets: [
+		.target(
+			// ...
+			dependencies: [
+				.product(name: "ScopedFilePath", package: "swift-scoped-file-path"),
+			]),
+	]
+)
+```
+
+Then, import `ScopedFilePath` in your code:
+
+```swift
+import ScopedFilePath
+
+// ...
+```