format-copy per Yi Fan

Format-copy adds a button to the tool bar to copy the current page's url in a specified format. My use case is to append "-q " to the front of the url to play a youtube video easily with a discord bot.

Todos:

• Add customization for the format
• Add nicer looking icons

Licenses notice:

• Add-on Icon and Tool-bar icon copyright Google under Apache license version 2.0