[9.x] Add @style Blade directive

[intrepidws]

Building upon the great work by @danharrin, who added the @class Blade directive in PR #38016, this PR adds support for a @style Blade directive. While my preference is always to use @class, I often find myself needing to conditionally use one-off styles in projects where I don't have access to Tailwind.

Usage is very similar to the @class blade directive, as follows:

<div>
    <span @style([
        'margin-top: 10px;',
        'font-weight: bold' => $active,
    ])>
        Dashboard
    </span>

    <svg @style([
        'font-weight: bold; text-decoration: underline;',
        'margin-top: 10px' => $active,
    ])>
        <path />
        <path />
        <path />
    </svg>
</div>

One thing to note is that when specifying the styles, it doesn't matter whether or not you end the line with a semi-colon - the logic will add it if it's missing.

If accepted, I will PR to the docs. I could also add @style support for blade components as well (similar to what PR #43140 did for the @class directive) - if that's something that's desired.

[taylorotwell]

I would suggest going ahead and adding support for Blade components. I don't think we would want to merge support for this without also supporting Blade components since @class is supported on both.

[taylorotwell]

Please mark as ready for review when done. Thanks!

[intrepidws]

No problem, this is ready for review @taylorotwell