Scale feature

[LoganTann]

• Add an option "Resize and convert to webp"
• Allow to specify the size of the file.
• The extension will then add the option -resize to the command line

By default, we can preview image files in vscode. Another feature would be to add a gui button to crop and resize the image to webp.

[axelrindle]

Adding a custom gui or a button to an existing preview gui seems to be a rather difficult task. While having a gui for resizing and previewing the changes would definitely be a great addition, I don't think I have enough experience with writing VSCode extensions to accomplish this task.

For now I'll stick with a simple input box to enter the desired new size.