Move Shared interfaces into a new typings file

This will enable sharing the internal interface with addons (and catching
breakages early)

src/Types.ts

@@ -3,14 +3,8 @@
  * @license MIT
  */
 
-export type LinkMatcherHandler = (event: MouseEvent, uri: string) => boolean | void;
-export type LinkMatcherValidationCallback = (uri: string, callback: (isValid: boolean) => void) => void;
-
 export type CustomKeyEventHandler = (event: KeyboardEvent) => boolean;
 
-export type CharData = [number, string, number, number];
-export type LineData = CharData[];
-
 export enum LinkHoverEventTypes {
   HOVER = 'linkhover',
   TOOLTIP = 'linktooltip',