Minify arbitrary values when printing candidates

[RobinMalfait]

This PR will optimize and simplify the candidates when printing the candidate again after running codemods.

When we parse a candidate, we will add spaces around operators, for example p-[calc(1px+1px)]] will internally be handled as calc(1px + 1px). Before this change, we would re-print this as: p-[calc(1px_+_1px)].

This PR changes that by simplifying the candidate again so that the output is p-[calc(1px+1px)]. In addition, if you wrote p-[calc(1px_+_1px)] then we will also simplify it to the concise form p-[calc(1px_+_1px)].

Some examples:

Input:

<div class="[p]:flex"></div>
<div class="[&:is(p)]:flex"></div>
<div class="has-[p]:flex"></div>
<div class="px-[theme(spacing.4)-1px]"></div>

Output before:

<div class="[&:is(p)]:flex"></div>
<div class="[&:is(p)]:flex"></div>
<div class="has-[&:is(p)]:flex"></div>
<div class="px-[var(--spacing-4)_-_1px]"></div>

Output after:

<div class="[p]:flex"></div>
<div class="[p]:flex"></div>
<div class="has-[p]:flex"></div>
<div class="px-[var(--spacing-4)-1px]"></div>

---

This is alternative implementation to #14717 and #14718
Closes: #14717
Closes: #14718

[RobinMalfait]

• Ensure we migrate theme(spacing.1) to var(--spacing-1) correctly #14723
• Minify arbitrary values when printing candidates #14720 👈
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[RobinMalfait]

Created a tuple with in and out (similar to the candidate above)