Create Theme v2 and define colors in palette

DesignKit/Source/Colors.swift

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+// 
+// Copyright 2021 New Vector Ltd
+//
+// 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
+import UIKit
+
+/// Colors at https://www.figma.com/file/X4XTH9iS2KGJ2wFKDqkyed/Compound?node-id=1255%3A1104
+@objc public protocol Colors {
+    
+    var accent: UIColor { get }
+    
+    var alert: UIColor { get }
+    
+    var primaryContent: UIColor { get }
+    
+    var secondaryContent: UIColor { get }
+    
+    var tertiaryContent: UIColor { get }
+    
+    var quarterlyContent: UIColor { get }
+    
+    var separator: UIColor { get }
+    
+    var toast: UIColor { get }
+    
+    var tile: UIColor { get }
+    
+    var navigation: UIColor { get }
+    
+    var background: UIColor { get }
+    
+    var namesAndAvatars: [UIColor] { get }
+    
+}

DesignKit/Source/ThemeV2.swift

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+// 
+// Copyright 2021 New Vector Ltd
+//
+// 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
+import UIKit
+
+/// Theme v2. May be named again as `Theme` when the migration completed.
+@objc public protocol ThemeV2 {
+    
+    /// Colors object
+    var colors: Colors { get }
+    
+    /// may contain more design components in future, like icons, audio files etc.
+    
+}