Feat : Save and import side settings

[harsh26shah03]

There were requests from multiple users that they use squoosh for compression but for each iteration side settings resets to default causing issues and there is no way to save and import side settings.

There will be two buttons adjacent to copy-over

save side settings : This will save side encoder and latest settings to localstorage of browser

import side settings : This will import side encoder and latest settings from localstorage of browser and replace the existing settings

Also if there are saved settings in locaStorage then whenever user loads the app it will take that settings and populate the side so user do not have to repeatedly enter same settings for similar compression operation subject to user has saved side settings

Update:1

Import settings button remains disabled if there is nothing to import

Whenever the side setting is saved there will be event fired and eventually listened to enable import button

All 2 operations show notifications now

Import notification has undo option now

https://user-images.githubusercontent.com/48324810/229767370-c4749545-6190-4f13-8203-757477ea08a1.mov

Closes #1299 Closes #1268 Closes #78 Closes #430

[harsh26shah03]

@argyleink have a look into this new feature

[surma]

Love this. I could see this being super useful. Only feedback at a skim is that the icons need some love, but I am sure @argyleink has ideas on that front, too :)

[harsh26shah03]

@argyleink changes are in now, your suggestion looks 👏