feat: add token mint name/symbol, decimals and delegatedAmount USD value

[johnrees]

This is a bit of a WIP and the code probably isn't idiomatic Vue but hopefully it is close to what you need.

I'd also like to add a linter like prettier in a separate PR if that's ok, so that spacing etc is consistent.

Before

After

TODO

I need to do some more refactoring and testing before I can say I'm happy with it.

It builds on #3 as there was going to be a lot of commit noise without it.

Checklist incoming...

[2501babe]

ooh this looks nice. is there a reason for avoiding @solana/spl-token-registry? i was gonna just use that but didnt look at its interface yet