ci: drop the unused bun and deno runtimes

[dinwwwh]

Nothing in the repo runs on bun or deno, so this removes their setup from CI and the leftover config that referred to them.

• CI: the test_node_matrix job no longer runs pnpm runtime set bun 1 or pnpm runtime set deno 2. The pnpm runtime set node step stays, since it sets the Node version for each matrix run (26, 24, 22).
• Config: removes the tests/bun/** and tests/deno/** excludes from vitest.config.ts (tests and coverage) and tsconfig.json. Neither folder exists, so these excludes had nothing to exclude.

Locally, sherif, oxlint, oxfmt and tsc pass, and all 118 vitest tests pass.

🤖 Generated with Claude Code

https://claude.ai/code/session_01YD9ddxDTLrRmbwtVjgfwLC

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[pkg-pr-new]

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npm i https://pkg.pr.new/uncheck@13

commit: 76e3fd0

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[pullfrog]

✅ No new issues found.

Reviewed changes

• CI drops unused runtimes — .github/workflows/ci.yaml no longer runs pnpm runtime set bun 1 or pnpm runtime set deno 2 in test_node_matrix; the pnpm runtime set node ${{ matrix.node-version }} step stays to pin the matrix version.
• Stale tsconfig excludes removed — tsconfig.json exclude becomes ["playgrounds/**"].
• Stale vitest excludes removed — vitest.config.ts drops ./tests/bun/** and ./tests/deno/** from test.exclude and coverage.exclude (benchmark.exclude never had them).

Verified independently: no tests/ directory exists, a repo-wide grep finds no remaining tests/bun/tests/deno or bun/deno runtime setup, and the only bun/deno references left are the legitimate package-manager detection in packages/uncheck/src/pm.ts and the README bunx note. CI is green on 76e3fd0.

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