Added various NPM scripts.

npm/npm-query-versions/action.yaml

@@ -0,0 +1,28 @@
+name: npm-query-versions
+description: "Get all versions of an NPM package from a registry."
+inputs:
+  name:
+    description: "Name of the package."
+    required: true
+  registry:
+    description: "NPM registry URL."
+    required: false
+    default: "https://npm.pkg.github.com"
+  authToken:
+    description: "Authentication token for the registry."
+    required: true
+  prerelease:
+    description: "Include prerelease packages. Values: true, false."
+    required: false
+    default: "false"
+outputs:
+  versions:
+    description: "Newline-separated list of versions."
+    value: ${{ steps.query.outputs.versions }}
+runs:
+  using: "composite"
+  steps:
+  - name: "Query NPM registry for versions."
+    id: query
+    run: bash ${{ github.action_path }}/query_versions.sh "${{ inputs.name }}" "${{ inputs.registry }}" "${{ inputs.authToken }}" "${{ inputs.prerelease }}"
+    shell: bash

npm/npm-query-versions/query_versions.sh

@@ -0,0 +1,45 @@
+#!/bin/bash
+set -e
+
+PACKAGE_NAME="$1"
+REGISTRY="$2"
+AUTH_TOKEN="$3"
+PRERELEASE="$4"
+
+if [[ ! -f "$GITHUB_OUTPUT" ]]; then
+    GITHUB_OUTPUT="/dev/fd/1"
+fi
+
+# Construct the registry URL
+REGISTRY_URL="$REGISTRY"
+if [[ "$REGISTRY" == "https://npm.pkg.github.com" ]]; then
+    # GitHub Packages uses a specific URL format
+    REGISTRY_URL="$REGISTRY"
+fi
+
+# Build curl headers
+CURL_HEADERS=(-H "Accept: application/vnd.npm.install-v1+json")
+if [[ -n "$AUTH_TOKEN" ]]; then
+    CURL_HEADERS+=(-H "Authorization: Bearer $AUTH_TOKEN")
+fi
+
+# Query the package metadata
+RESPONSE=$(curl -sL "${CURL_HEADERS[@]}" "$REGISTRY_URL/$PACKAGE_NAME" 2>/dev/null || echo "{}")
+
+# Extract versions
+if [[ "$PRERELEASE" == "true" ]]; then
+    # Get all versions
+    VERSIONS=$(echo "$RESPONSE" | jq -r '.versions | keys[]' 2>/dev/null || echo "")
+else
+    # Filter out prerelease versions (those with - in them)
+    VERSIONS=$(echo "$RESPONSE" | jq -r '.versions | keys[] | select(contains("-") | not)' 2>/dev/null || echo "")
+fi
+
+# Output versions separated by newlines
+if [[ -n "$VERSIONS" ]]; then
+    echo "versions<<EOF" >> "$GITHUB_OUTPUT"
+    echo "$VERSIONS" >> "$GITHUB_OUTPUT"
+    echo "EOF" >> "$GITHUB_OUTPUT"
+else
+    echo "versions=" >> "$GITHUB_OUTPUT"
+fi