Feature Request: Multiple selection to merge people

[chicco-carone]

I just started using immich and I needed to merge a lot of unrecognized people into one singular one but doing it manually for every time that i find one is getting very annoying so i think that it would be a great add to have a button to start a multiple selection and then you can merge all the people that you selected in one person to make it way faster. With this it would be great to have a number of people shown in the page since the default is a little bit too little people so there could be a dropdown to select how many people per page with possibly a custom value but if there are limits when pulling this data from immich at least a dropdown up to 100 people would be great