feat: new design

[reneaaron]

TODO

• Middle button on send screen misses shadows
• Placeholder text color
• Autofocus amount inputs on send / receive screens
• Success animation color (@reneaaron)
• Changing wallet doesn't reload balance on home screen (@reneaaron)
• optional comment / LNURL Pay page looks bad - everything feels the same priority
• there is a black square around the success page animation (I guess this is not done yet - both send and receive)
• use loading states on the pay buttons instead of an empty screen with a small loading spinner
• on wallet page, notifications capability warning is showing when it shouldn't @rolznz
• No back button on transactions page
• Icons on homescreen buttons are not able to be colorized (@reneaaron tries to replace with react native popicons)
• Check shadows on iOS (buttons @rolznz) - moved to separate issue
• Validate input (invalid payment requests seem to cause an exception, not sure if that is the same in the production build)
• Disable buttons while loading (prevent paying the same invoice twice)