High-accuracy detection in the browser

[Richienb]

const {bitness} = await navigator.userAgentData.getHighEntropyValues(['bitness']);

See:

• https://wicg.github.io/ua-client-hints/#user-agent-platform-bitness
• https://developer.mozilla.org/en-US/docs/Web/API/NavigatorUAData/getHighEntropyValues#return_value