feat(docs): add PkgManagers tabs

[gioboa]

[netlify]

‼️ Deploy request for qwik-insights rejected.

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🔨 Latest commit	5d8a492

[pkg-pr-new]

commit: 5c48714

npm i https://pkg.pr.new/@builder.io/qwik@6636

npm i https://pkg.pr.new/@builder.io/qwik-city@6636

npm i https://pkg.pr.new/eslint-plugin-qwik@6636

npm i https://pkg.pr.new/create-qwik@6636

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[changeset-bot]

⚠️ No Changeset found

Latest commit: 3cc117a

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[gioboa]

It builds correctly

[wmertens]