Implemented the "localisation(for:)" function of the Bundle+LocalisationBundle extension for the Core library.

Sources/Core/Extensions/Bundle+LocalisationBundle.swift

@@ -0,0 +1,38 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the SwiftLibs open source project
+//
+// Copyright (c) 2023 Röck+Cöde VoF. and the SwiftLibs project authors
+// Licensed under the EUPL 1.2 or later.
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of SwiftLibs project authors
+//
+//===----------------------------------------------------------------------===//
+
+import Foundation
+
+public extension Bundle {
+    
+    // MARK: Functions
+    
+    func localisation(for languageCode: String) throws -> Bundle {
+        guard
+            let path = path(forResource: languageCode, ofType: .ResourceType.localisationBundle),
+            let bundle = Bundle(path: path)
+        else {
+            throw BundleError.bundleNotFound
+        }
+        
+        return bundle
+    }
+
+}
+
+// MARK: - String+Constants
+
+private extension String {
+    enum ResourceType {
+        static let localisationBundle = "lproj"
+    }
+}