Add warning markers for properties/APIs marked @deprecated in JSDoc

[TedDriggs]

monaco-typescript doesn't seem to do anything with @deprecated markers in typings or in JS code. In other IDEs, APIs marked with @deprecated, [Obsolete] etc. are given yellow markers and their deprecation messages are shown as warnings.

Here's a sample of the property being used in monaco-typescript itself (source)

/**
 * Options for a model decoration.
 */
export interface IModelDecorationOptions {
    /**
     * @deprecated : Use `overviewRuler` instead
     */
    showInOverviewRuler?: string;
}