chore: pin npm

[ferhatelmas]

What kind of change does this PR introduce?

chore

What is the current behavior?

npm version isn't pinned.

What is the new behavior?

npm is pinned across every usage.

Additional context

It's needed because package lock format can change and fail later on.

[Copilot]

Pull request overview

This PR aims to make npm version usage deterministic across the repo to prevent future package-lock.json format drift and CI failures by pinning npm consistently.

Changes:

• Adds packageManager: "npm@11.12.1" and tightens engines to specify supported Node/npm ranges.
• Regenerates package-lock.json under the pinned npm version (plus updates root metadata like packageManager/engines).
• Updates GitHub Actions workflows to use a new composite action that sets up Node and enforces an exact npm version.

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
package.json	Pins npm via packageManager and adds Node/npm engine constraints.
package-lock.json	Updates lockfile metadata/content to match the pinned npm environment.
.github/workflows/ci.yml	Switches CI jobs to use the shared Node+npm setup action.
.github/workflows/docs.yml	Switches docs workflow to use the shared Node+npm setup action.
.github/workflows/release.yml	Switches release workflow to use the shared Node+npm setup action.
.github/actions/setup-node-npm/action.yml	Introduces a composite action to set up Node and pin npm before running npm commands.

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[coveralls]

Coverage Report for CI Build 24398781747

Coverage increased (+0.001%) to 82.423%

Details

• Coverage increased (+0.001%) from the base build.
• Patch coverage: No coverable lines changed in this PR.
• No coverage regressions found.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	33967
Covered Lines:	30482
Line Coverage:	89.74%
Relevant Branches:	7462
Covered Branches:	3665
Branch Coverage:	49.12%
Branches in Coverage %:	Yes
Coverage Strength:	345.22 hits per line

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💛 - Coveralls

[Copilot]

Pull request overview

Copilot reviewed 7 out of 8 changed files in this pull request and generated 1 comment.

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[Copilot]

Pull request overview

Copilot reviewed 8 out of 9 changed files in this pull request and generated no new comments.

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