Defined the ResourceFile enumeration in the library target and also, implemented its "fileName" computed property.

Library/Sources/Enumerations/ResourceFile.swift

@@ -0,0 +1,29 @@
+enum ResourceFile: String {
+    case dockerIgnore = "docker_ignore"
+    case gitIgnore = "git_ignore"
+    case license
+    case package
+    case readme
+}
+
+// MARK: - Properties
+
+extension ResourceFile {
+    
+    // MARK: Computed
+
+    var fileName: String {
+        switch self {
+        case .dockerIgnore: return ".dockerignore"
+        case .gitIgnore: return ".gitignore"
+        case .license: return "LICENSE"
+        case .readme: return "README.md"
+        case .package: return "Package.swift"
+        }
+    }
+    
+}
+
+// MARK: - CaseIterable
+
+extension ResourceFile: CaseIterable {}