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

src/plugins/camera.ts

@@ -193,7 +193,7 @@ export class Camera {
   /**
    * Take a picture or video, or load one from the library.
    * @param {CameraOptions?} options Options that you want to pass to the camera. Encoding type, quality, etc. Optional
-   * @return {Promise} Returns a Promise that resolves with Base64 encoding of the image data, or the image file URI, depending on cameraOptions, otherwise rejects with an error.
+   * @returns {Promise<any>} Returns a Promise that resolves with Base64 encoding of the image data, or the image file URI, depending on cameraOptions, otherwise rejects with an error.
    */
   @Cordova({
     callbackOrder: 'reverse'
@@ -203,7 +203,7 @@ export class Camera {
   /**
    * Remove intermediate image files that are kept in temporary storage after calling camera.getPicture.
    * Applies only when the value of Camera.sourceType equals Camera.PictureSourceType.CAMERA and the Camera.destinationType equals Camera.DestinationType.FILE_URI.
-   * @return Returns a Promise
+   * @returns {Promise<any>}
    */
   @Cordova({
     platforms: ['iOS']