Normalize date/time input styles

[adamwathan]

This PR adds some additional styles to Preflight to normalize a bunch of inconsistencies in date/time inputs across browsers.

The main motivation for this is to remove these insane classes we have to add in Catalyst:

<input type="date" class="[&::-webkit-datetime-edit-fields-wrapper]:p-0 [&::-webkit-date-and-time-value]:min-h-[1.5em]
[&::-webkit-datetime-edit]:inline-flex [&::-webkit-datetime-edit]:p-0 [&::-webkit-datetime-edit-year-field]:p-0
[&::-webkit-datetime-edit-month-field]:p-0 [&::-webkit-datetime-edit-day-field]:p-0
[&::-webkit-datetime-edit-hour-field]:p-0 [&::-webkit-datetime-edit-minute-field]:p-0
[&::-webkit-datetime-edit-second-field]:p-0 [&::-webkit-datetime-edit-millisecond-field]:p-0
[&::-webkit-datetime-edit-meridiem-field]:p-0"/>

With these normalizations, changing things like padding, display type, etc. gives consistent results (at least as consistent as is actually possible) across all browsers.

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Make text alignment work on iOS Safari

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Don't shrink date inputs on iOS Safari when there is no selected value

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Fix padding in macOS Safari