Improve purge_and_reinstall_nodejs.sh to be OS/arch agnostic with install options (#27)

* Initial plan

* Improve purge_and_reinstall_nodejs.sh script to be more general and agnostic

Co-authored-by: djeada <37275728+djeada@users.noreply.github.com>

* Address code review feedback: improve security, cross-platform support, and JSON parsing

Co-authored-by: djeada <37275728+djeada@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: djeada <37275728+djeada@users.noreply.github.com>

Author: Copilot