Add Annual Percentage View for Inflation Rate

[rickstaa]

Request: Add a toggle to display the Inflation Rate as an Annual Percentage.
Rationale: Presenting inflation in annual terms provides a standardized metric that is easier for users to interpret and compare with other economic indicators.

[ECWireless]

@rickstaa where do you recommend we get this data? I assume the Livepeer API should calculate this on their end... but perhaps it's light-weight enough to do in the Vercel API /usage function