Add assets table to portfolio page

[grod220]

• Queries view service
• Assets filtered by sub-account selected
• Actions correspond to swap in/out
• Likely need to implement new backend endpoint for price

Figma reference: https://www.figma.com/design/xWsVprkEgEihweVN9isrGQ/DEX-(Incl.-UI-Lib)?node-id=3658-145100&p=f&t=5zoqHAAlNcIDzQhM-0

[TalDerei]

re-price: all the stats info we need are already available from pindexer, and I’ve implemented a shared helper that performs these conversions as part of #188, which we can review later.

I’d be interested in taking on this ticket.

[TalDerei]

@vacekj note that the new backend endpoint for price is already in #223, so you can just stub that for now.