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

src/plugins/clipboard.ts

@@ -39,14 +39,14 @@ export class Clipboard {
   /**
    * Copies the given text
    * @param {string} text Text that gets copied on the system clipboard
-   * @returns {Promise<T>} Returns a promise after the text has been copied
+   * @returns {Promise<any>} Returns a promise after the text has been copied
    */
   @Cordova()
   static copy(text: string): Promise<any> { return; }
 
   /**
    * Pastes the text stored in clipboard
-   * @returns {Promise<T>} Returns a promise after the text has been pasted
+   * @returns {Promise<any>} Returns a promise after the text has been pasted
    */
   @Cordova()
   static paste(): Promise<any> { return; }