#150: Use standard file headers everywhere.

* Add default header in IDETemplateMacros.plist.
* Use the standard header everywhere.

ElementX/Sources/Services/UserSessionStore/KeychainControllerProtocol.swift

@@ -1,9 +1,17 @@
 //
-//  KeychainControllerProtocol.swift
-//  ElementX
+// Copyright 2022 New Vector Ltd
 //
-//  Created by Stefan Ceriu on 14.02.2022.
-//  Copyright © 2022 Element. All rights reserved.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
 //
 
 import Foundation