docs(all): standardizes and adds return types, also some param fixes

src/plugins/webintent.ts

@@ -35,21 +35,43 @@ export class WebIntent {
     return window.plugins.webintent.EXTRA_TEXT;
   }
 
+  /**
+   * @param options {Object} { action: any, url: string, type?: string }
+   * @returns {Promise<any>}
+   */
   @Cordova()
   static startActivity(options: { action: any, url: string, type?: string }): Promise<any> { return; }
 
+  /**
+   * @param extra {any}
+   * @returns {Promise<any>}
+   */
   @Cordova()
   static hasExtra(extra: any): Promise<any> { return; }
 
+  /**
+   * @param extra {any}
+   * @returns {Promise<any>}
+   */
   @Cordova()
   static getExtra(extra: any): Promise<any> { return; }
 
+  /**
+   * @returns {Promise<any>}
+   */
   @Cordova()
   static getUri(): Promise<string> { return; };
 
+  /**
+   * @returns {Promise<string>}
+   */
   @Cordova()
   static onNewIntent(): Promise<string> { return; };
 
+  /**
+   * @param options {Object} { action: string, extras?: { option: boolean } }
+   * @returns {Promise<any>}
+   */
   @Cordova()
   static sendBroadcast(options: { action: string, extras?: { option: boolean } }): Promise<any> { return; }