Update icons package

[mica000]

Replace/Add new icon
All new icons are listed here as exportable SVGs. Faded icons are assumed to not be necessary right now. All icons exist as 16x16 and 24x24 versions. In many cases only either version is actually used.

Move icons to new UI library
Move icons to new UI library and demo them with storybook so that it's easier to see what's currently in use and match those with Figma assets.

TBD/Discussed
Maybe we should seperate token images/icons from UI icons? Right now it can get a bit confusing when looking at the icon folder. In most cases, token icons are actually logos and not icons.

Need help?

• @fabric-8 is happy to jump in and help with the grunt work of getting the icons in, provided an engineer can put a "template" in place of how we'll handle the icon sizes and what the (updated?) react icon components should look like.
• Reach out to @fabric-8 to discuss JSX/TSX export options in case the svg export is just too laborious or annoying ✌️ There might be plugin options for conversion.

[fbwoolf]

There are two icons still missing we will need to replace in the code:

1. MegaphoneIcon - currently used in the feedback button
2. RotateLeftIcon - currently used on the backup secret key page next to Your Secret Key gives access to your wallet

[fabric-8]

@fbwoolf Left comments on FIgma regarding the 2 missing icons:

• MegaphoneIcon was added
• RotateLeftIcon has been replaced with a different icon (key)