Circular progress ring (SVG) for "X% toward Y" displays -- graduation
progress, vesting unlock, vault deposit cap. The circular variant of
Web3.Ui.SupplyBar.
Web3.Ui.ProgressRing.view
{ current = curve.curvePls
, target = graduationThreshold
, size = 64
, label = Just "graduation"
}current / target is divided in BigInt space and the arc geometry is carried
as hundredths of a pixel, so nothing is routed through Float.
CSS classes: web3-progressring, web3-progressring__track,
web3-progressring__fill, web3-progressring__label. Stroke width and color
come from CSS -- set stroke and stroke-width on the __track and __fill
elements; geometry is inline for SVG.
Render the ring.