Improve purge_and_reinstall_nodejs.sh to be OS/arch agnostic with install options

[Copilot]

The original script was hardcoded for linux-x64 and always reinstalled the latest version. Refactored to support multiple platforms and provide flexibility for distro vs upstream Node.js versions.

Changes

Platform Detection

• OS detection: Linux, macOS, Windows
• Architecture mapping: x64, arm64, armv7l, x86, ppc64le, s390x
• Package manager detection: apt, dnf, yum, pacman, zypper, apk, brew

New CLI Options

• --distro — Install via system package manager (distro-supported version)
• --latest — Install newest from nodejs.org
• --lts — Install latest LTS from nodejs.org
• --version VERSION — Install specific version
• --purge-only — Only purge, skip reinstall
• --dry-run, --verbose, --skip-user-cleanup

Code Quality

• Uses jq for JSON parsing when available, with grep fallback
• Cross-platform user directories (/home vs /Users)
• Secure glob handling via find instead of shell expansion
• Passes shellcheck

Usage

# Install distro-packaged version
./purge_and_reinstall_nodejs.sh --distro

# Install latest from nodejs.org (globally newest)
./purge_and_reinstall_nodejs.sh --latest

# Install LTS version
./purge_and_reinstall_nodejs.sh --lts

# Preview without changes
./purge_and_reinstall_nodejs.sh --dry-run --verbose

Original prompt

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This section details on the original issue you should resolve

<issue_title>improve, make more general and agnostic script to purge npm, add option to install newest available (supported officially for distor vs globally newest)</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes improve, make more general and agnostic script to purge npm, add option to install newest available (supported officially for distor vs globally newest) #26

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