Add LLM, MCP and Agents courses from Hugging Face (#12165)

courses/free-courses-en.md

@@ -260,6 +260,7 @@
 
 ### Artificial Intelligence
 
+* [Agents Course](https://huggingface.co/learn/agents-course/unit0/introduction) - Hugging Face
 * [AI Courses](https://software.intel.com/content/www/us/en/develop/topics/ai/training/courses.html) - Intel Corporation
 * [AI Fundamentals](https://www.udacity.com/course/ai-fundamentals--ud099) - Microsoft Azure (Udacity)
 * [AI Python for Beginners](https://www.deeplearning.ai/short-courses/ai-python-for-beginners/) - Andrew Ng (DeepLearning.ai)
@@ -276,6 +277,8 @@
 * [IBM AI Engineering Professional Certificate](https://www.coursera.org/professional-certificates/ai-engineer) - Romeo Kienzler, Saeed Aghabozorgi, Joseph Santarcangelo, Alex Aklson et al. (Coursera)
 * [Intro to Claude AI](https://v2.scrimba.com/claude-ai-c09gsmkso3) - Shant Dashjian (Scrimba)
 * [Introduction to TensorFlow for Artificial Intelligence, Machine Learning, and Deep Learning](https://www.coursera.org/learn/introduction-tensorflow) - DeepLearning.ai (Coursera)
+* [LLM Course](https://huggingface.co/learn/llm-course/chapter0/1) - Hugging Face
+* [MCP Course](https://huggingface.co/learn/mcp-course/unit0/introduction) - Hugging Face
 * [MIT Deep Learning and Artificial Intelligence Lectures](https://deeplearning.mit.edu) - Lex Fridman, et al.
 * [MIT's Artificial Intelligence](http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-034-artificial-intelligence-fall-2010/) - Patrick Henry Winston (MIT OpenCourseWare)
 * [NLP Course](https://huggingface.co/learn/nlp-course) - Hugging Face