type convert for multiple images

[Kyogre]

Checklist

• I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the request will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.

Feature description

Add type convert for multiple images.

Why do you want this feature?

For example: to convert multiple photos from heic to jpg type.

Additional information

Look for implementation in Aves gallery.

[Kyogre]

As I understood, #701 need to be completed firstly