Remove !important from utilities

[Copilot]

What are you trying to accomplish?

Remove !important from all utility styles under src/utilities/ while preserving selectors, declarations, and generated utility coverage.

What approach did you choose and why?

• Removed !important annotations from utility SCSS declarations, including responsive and mixin-generated utilities.
• Updated the visibility/display import-order comment to describe source-order precedence without !important.
• Added a regression test that scans src/utilities/ for !important.

.border {
  border: $border-rem;
}

What should reviewers focus on?

• Cascade impact from removing !important, especially utilities that previously relied on it for overrides.
• The regression test coverage for the complete utilities tree.

Validation run:

• rg "!important" src/utilities
• npm run stylelint
• npm run eslint
• npm run dist
• npm run build:css
• npm test

Can these changes ship as is?

• Yes, this PR does not depend on additional changes. 🚢

[changeset-bot]

⚠️ No Changeset found

Latest commit: 3bce220

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[jonrohan]

@copilot Put all the !important back in the show-on-focus class

[Copilot]

Restored the !important annotations in .show-on-focus in 3bce220 and updated the regression test to allow only that exception.