feat(RES-58): Add new parameter "bundle" (#19)

Add bundle parameter to define if resource should be load from Bundle.main (app) or Bundle.module (SPM package)

Reviewed-on: #19

Sources/ResgenSwift/Strings/Stringium/StringiumOptions.swift

@@ -57,6 +57,11 @@ struct StringiumOptions: ParsableArguments {
     )
     var extensionVisibility: ExtensionVisibility = .internal
 
+    @Option(
+        help: "Bundle where the asset are generated"
+    )
+    var assetBundle: AssetBundle = .main
+
     @Option(
         help: "Path where to generate the extension.",
         transform: { $0.replaceTiltWithHomeDirectoryPath() }