Name time options with a millisecond suffix #536

Time options use four names today: wait, delay, timeThreshold and throttleMs. Putting the unit in the name makes each option self-explanatory, and #530 already uses debounceMs, throttleMs and delayMs for the callback and interval hooks.

Rename the remaining options:

• useLongPress: delay → delayMs
• useImpressionRef and ImpressionArea: timeThreshold → timeThresholdMs
• useAvoidKeyboard: transitionDuration → transitionDurationMs
• useDebouncedValue: wait → debounceMs
• useThrottledValue: wait → throttleMs
• useTimeout: delay → delayMs

The first three are option keys and break existing code. The last three are positional parameters, so only types and docs change. useDoubleClick is covered in #535. Update types, docs, and tests.

Waits for #530 and #531.