docs: add links to other language versions of README

Added language selection links to the README for easier access to translated versions: German, Spanish, French, Japanese, Korean, Portuguese, Russian, and Chinese.

Author: dowithless

README.md

@@ -1,5 +1,15 @@
 # GPT Crawler <!-- omit from toc -->
 
+<!-- Keep these links. Translations will automatically update with the README. -->
+[Deutsch](https://www.readme-i18n.com/BuilderIO/gpt-crawler?lang=de) | 
+[Español](https://www.readme-i18n.com/BuilderIO/gpt-crawler?lang=es) | 
+[français](https://www.readme-i18n.com/BuilderIO/gpt-crawler?lang=fr) | 
+[日本語](https://www.readme-i18n.com/BuilderIO/gpt-crawler?lang=ja) | 
+[한국어](https://www.readme-i18n.com/BuilderIO/gpt-crawler?lang=ko) | 
+[Português](https://www.readme-i18n.com/BuilderIO/gpt-crawler?lang=pt) | 
+[Русский](https://www.readme-i18n.com/BuilderIO/gpt-crawler?lang=ru) | 
+[中文](https://www.readme-i18n.com/BuilderIO/gpt-crawler?lang=zh)
+
 Crawl a site to generate knowledge files to create your own custom GPT from one or multiple URLs
 
 ![Gif showing the crawl run](https://github.com/BuilderIO/gpt-crawler/assets/844291/feb8763a-152b-4708-9c92-013b5c70d2f2)