Implemented the "init(at: )" initialiser function for the URL+Inits extension in the Library target.

Sources/Library/Extensions/URL+Inits.swift

@@ -0,0 +1,15 @@
+import Foundation
+
+extension URL {
+    
+    // MARK: Initialisers
+    
+    init(at filePath: String) {
+        if #available(macOS 13.0, *) {
+            self = URL(filePath: filePath)
+        } else {
+            self = URL(fileURLWithPath: filePath)
+        }
+    }
+    
+}