input: def crawl(url: str):
      """ A web crawler function that starts from a given URL and iterates through the found links to scrape the page contents. The function should use BeautifulSoup and the requests library to manage HTTP requests and parse HTML content.
      >>> crawl('https://example.com')
      (Assumes that the function executes until all link queues are exhausted or max depth is reached.)
      """
output:     
      import requests
      from bs4 import BeautifulSoup
      from urllib.parse import urljoin
  
      visited_urls = set()
      queue = [url]
  
      while queue:
          current_url = queue.pop(0)
          if current_url in visited_urls:
              continue
  
          try:
              response = requests.get(current_url)
              response.raise_for_status()
          except requests.RequestException:
              continue
  
          visited_urls.add(current_url)
          soup = BeautifulSoup(response.text, 'html.parser')
  
          # Scrape page contents here
          print(f"Scraping {current_url}")
  
          for link in soup.find_all('a', href=True):
              absolute_url = urljoin(current_url, link['href'])
              if absolute_url not in visited_urls:
                  queue.append(absolute_url)
  