Move ColorManager to ui

Part of #2005
Part of #1507

src/Types.ts

@@ -4,10 +4,11 @@
  */
 
 import { ITerminalOptions as IPublicTerminalOptions, IEventEmitter, IDisposable, IMarker, ISelectionPosition } from 'xterm';
-import { IColorSet, IRenderer } from './renderer/Types';
+import { IRenderer } from './renderer/Types';
 import { ICharset, IAttributeData, ICellData, IBufferLine, CharData } from './core/Types';
 import { ICircularList } from './common/Types';
 import { IEvent } from './common/EventEmitter2';
+import { IColorSet } from './ui/Types';
 
 export type CustomKeyEventHandler = (event: KeyboardEvent) => boolean;