add page for aur search

install aur package by button click

frontend/lib/models/aur_package.dart

@@ -0,0 +1,12 @@
+class AurPackage {
+  final String name, version;
+
+  AurPackage({required this.name, required this.version});
+
+  factory AurPackage.fromJson(Map<String, dynamic> json) {
+    return AurPackage(
+      name: json["name"] as String,
+      version: json["version"] as String,
+    );
+  }
+}