Resolves#15170.
This PR adds support for bare integer values to the `col-*` and `row-*`
utilities:
```css
.col-5 {
grid-column: 5;
}
.row-6 {
grid-row: 6;
}
```
These properties are shorthands for
`grid-column-start`/`grid-column-end` and
`grid-row-start`/`grid-row-end`, so using a bare integer value ends up
being a shortcut for:
```css
.col-5 {
grid-column-start: 5;
grid-column-end: auto;
}
```
…which makes these basically work like an alternative to `col-start-*`
and `row-start-*`.
These support negative values like `-col-6` as well, which also
technically extends to arbitrary values like `-col-[6/span_2]` now even
though that is a junk value. I've decided not to guard against that
though and just consider it user error to keep the implementation
simple.
---------
Co-authored-by: Adam Wathan <4323180+adamwathan@users.noreply.github.com>
Co-authored-by: Philipp Spiess <hello@philippspiess.com>
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