fix(linter/import/no-duplicates): preserve type modifiers when merging imports

[camc314]

Summary

• fix import/no-duplicates when merging a top-level type import with a mixed value/type import
• convert the target to inline type specifiers when required to keep the merged import syntactically valid
• preserve type-only semantics for both import orderings
• add regression coverage based on the Next.js ecosystem CI failure: https://github.com/oxc-project/oxc-ecosystem-ci/actions/runs/29248475854/job/86812762690

[Copilot]

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[oxc-guard]

Oxlint Ecosystem CI

suite	result
napi-rs/napi-rs	✅
calcom/cal.com	✅
sidebase/nuxt-auth	❌
toeverything/affine	✅
rolldown/rolldown	❌
preactjs/preact	❌
bbc/simorgh	✅
elastic/kibana	✅
microsoft/vscode	✅
DefinitelyTyped/DefinitelyTyped	✅
monkeytypegame/monkeytype	✅
nestjs/nest	✅
Milkdown/milkdown	✅
glide-browser/glide	❌
vercel/next.js	❌
oxidecomputer/console	✅
actualbudget/actual	❌
formatjs/formatjs	✅
npmx-dev/npmx.dev	✅
bluesky-social/social-app	✅
renovatebot/renovate	❌
vercel/turborepo	❌
cloudflare/workers-sdk	❌
PostHog/posthog	❌
matter-js/matter.js	✅
cloudflare/agents	✅
outline/outline	✅
oven-sh/bun	❌
date-fns/date-fns	❌

[chatgpt-codex-connector]

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[codspeed-hq]

Merging this PR will not alter performance

✅ 5 untouched benchmarks
⏩ 66 skipped benchmarks¹

---

_{Comparing codex/fix-no-duplicates-type-import-merge (be40706) with main (e86e0d8)²}

Footnotes

1. 66 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on main (df67932) during the generation of this report, so e86e0d8 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[camc314]

Merge activity

• Jul 13, 2:28 PM UTC: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Jul 13, 2:30 PM UTC: camc314 added this pull request to the Graphite merge queue.
• Jul 13, 2:34 PM UTC: Merged by the Graphite merge queue.