Implement recursive watching of a directory

Sources/Inotify/DirectoryResolverErrror.swift

@@ -0,0 +1,16 @@
+import Foundation
+import SystemPackage
+
+public enum DirectoryResolverError: LocalizedError, Equatable {
+	case pathNotFound(FilePath)
+	case pathIsNoDirectory(FilePath)
+
+	var errorDescription: String {
+		switch self {
+		case .pathNotFound(let path):
+			return "Path not found: \(path)"
+		case .pathIsNoDirectory(let path):
+			return "Path is not a directory: \(path)"
+		}
+	}
+}