Add logo to README and new image file

- Added centered logo to `README.md` using `<p>` and `<img>` tags.
- Added new image file `docs/ait.webp`.

README.md

@@ -1,5 +1,9 @@
 ![Time](https://waka.mpassarello.de/api/badge/MaxP/interval:any/project:Ait?label=Project%20time)
 
+<p align="center">
+  <img width="600" src="./docs/ait.webp">
+</p>
+
 # AI-Generated Messages from Git Diffs and Logs
 
 This script uses the OpenAI API to generate text based on the outputs of `git diff` and `git log` commands. It can be particularly useful for creating pull request descriptions, commit messages, or any other narrative that requires summarizing changes between different branches or commits in a Git repository.