Full 2025 lecture material

At the end of each lecture and exercise session, the material has been revised and some typos have been fixed. All the lecture material is here attached in a unique PDF file (including exercises). Hyperlinks and bookmarks should work as in the files of the single days. 🔝 😎 A new file collecting all links from all slides to read material beyond the lecture has been added to the repository and is attached here again for convenience. 🙃