fix: improve npm installation by using pacote for package resolution

[achaljhawar]

• Add pacote dependency for more stable package name resolution
• Update generator.js to use pacote.manifest() instead of internal arborist symbols
• Clean up arborist mock and add new pacote mock for testing

These changes improve package name resolution by using a more stable public API from pacote instead of relying on internal arborist symbols. The changes are focused solely on the package resolution logic, without modifying workflows, arborist version, or supported engines.

Related issue(s)
Resolves #1102

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Latest commit: c406606

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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