feat: support-pnpm-package-manager [ZEND-6808]

Based on [this PR](#2631) , with minor tweaks.

Author: michaelpineirocontentful

packages/contentful--create-contentful-app/src/utils.ts

@@ -1,5 +1,5 @@
 import { spawn, SpawnOptionsWithoutStdio } from 'child_process';
-import { existsSync, rmSync } from 'fs';
+import { existsSync, readFileSync, rmSync } from 'fs';
 import { basename } from 'path';
 import { choice, highlight, warn } from './logger';
 import { CLIOptions, ContentfulExample, PackageManager } from './types';
@@ -27,15 +27,23 @@ export function rmIfExists(path: string) {
 }
 
 export function detectActivePackageManager(): PackageManager {
+  if (existsSync('pnpm-lock.yaml')) return 'pnpm';
+  if (existsSync('yarn.lock')) return 'yarn';
+  if (existsSync('package-lock.json')) return 'npm';
+
+  try {
+    const pkg = JSON.parse(readFileSync('package.json', 'utf8'));
+    if (pkg.packageManager?.startsWith('pnpm')) return 'pnpm';
+    if (pkg.packageManager?.startsWith('yarn')) return 'yarn';
+    if (pkg.packageManager?.startsWith('npm')) return 'npm';
+  } catch { }
+
   switch (basename(process.env.npm_execpath || '')) {
-    case 'yarn.js':
-      return 'yarn';
-    case 'pnpm.cjs':
-      return 'pnpm';
+    case 'yarn.js': return 'yarn';
+    case 'pnpm.cjs': return 'pnpm';
     case 'npx-cli.js':
     case 'npm-cli.js':
-    default:
-      return 'npm';
+    default: return 'npm';
   }
 }
 
@@ -79,12 +87,12 @@ export function normalizeOptions(options: CLIOptions): CLIOptions {
     });
 
     // Select active package manager
-    (normalizedOptions as Record<string, boolean>)[activePackageManager] = true;
+    (normalizedOptions as CLIOptions)[activePackageManager] = true;
   }
 
   // No package manager flags were provided, use active package manager
   if (selectedPackageManagers.length === 0) {
-    (normalizedOptions as Record<string, boolean>)[activePackageManager] = true;
+    (normalizedOptions as CLIOptions)[activePackageManager] = true;
   }
 
   let fallbackOption = '--typescript';

packages/contentful--create-contentful-app/test/utils.spec.ts

@@ -1,3 +1,5 @@
+/// <reference types="node" /> 
+// The above directive tells TypeScript to include Node.js type definitions (i.e. process)
 import { expect } from 'chai';
 import {
   detectActivePackageManager,