refactor: optimize rules and redesign options

[zyyv]

Warning

This PR changes the following:

• Optimized previous rules to better conform to Unocss syntax and speed up parsing.

• Deprecated numberToUnit. Unocss has built-in number unit parsing; I recommend aligning it with presetWind3and presetWind4. If unit conversion is needed, handle it in other steps, such as postprocess.

• Deprecated prefix. Prefixes are not compatible with shortcuts in sccollbar. sccollbar is already quite special, and I believe prefixes are sufficient; they are redundant and should be removed.

• Rename noCompatible to compatible

• Updated test snapshots.

fixes #20, fixes #15, fixes #16

[Copilot]

Pull request overview

Refactors the unocss-preset-scrollbar preset API and rule set to streamline utilities/autocomplete and adjust compatibility behavior, with corresponding Vitest snapshot updates.

Changes:

• Switch test setup to presetWind3 and adjust generator usage/autocomplete snapshots.
• Redesign preset options (noCompatible -> compatible, remove prefix/numberToUnit), and refactor rules (unify thumb/track color rules, add opacity utilities).
• Update snapshots to reflect new generated CSS for default + compatible modes.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
test/index.test.ts	Updates generator preset and modifies assertions/snapshots for new rule outputs and autocomplete shape.
test/index-compatible.test.ts	Updates option name to compatible and refreshes snapshots for the “compatible” configuration.
test/snapshots/index.test.ts.snap	Snapshot updates for new default CSS output and removed tests.
test/snapshots/index-compatible.test.ts.snap	Snapshot updates for new “compatible” test output.
src/index.ts	Core refactor of preset options, shortcuts, rules, and compatibility behavior.

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[zyyv]

@action-hong Would you be able to review this?
Also, my npm account has changed; I need to do OIDC publishing, which requires settings on npm. Could you please try inviting my new npm account? Looking forward to your reply.