New Costs API

[rvagg]

• account level spend/costs
• account level total storage
• upload cost per 30 days (for UI and pre-upload check)
  • Support CDN being egress based and floor pricing. Setup fee 1 usdf
• all calculations in bigint use dnum if needed (related to feat: support safer size and rate/lockup calculations #242 )
• should enable pre upload check, "with the current funds and lockup can i upload these files?"
• should enable "Account will run out of funds in X days, deposit X amount to cover at least the next 30 days"

References:

• refactor(sdk): ServiceInfo rename, accurate pricing separation, reusable primitives #375 previous attempt at this with lots of context

[rvagg]

Renaming this and using it as a parent for a bunch of related work