docs: add llm-jupyter plugin

docs/plugins/directory.md

@@ -50,6 +50,7 @@ If an API model host provides an OpenAI-compatible API you can also [configure L
 ## Extra commands
 
 - **[llm-cmd](https://github.com/simonw/llm-cmd)** accepts a prompt for a shell command, runs that prompt and populates the result in your shell so you can review it, edit it and then hit `<enter>` to execute or `ctrl+c` to cancel.
+- **[llm-jupyter](https://github.com/lucasrcezimbra/llm-jupyter)** adds `llm ipython` and `llm notebook` commands for running an IPython interpreter or notebook in the same virtual environment as LLM. It also adds a `%llm` magic function to call llm from inside the interpreter or notebook.
 - **[llm-python](https://github.com/simonw/llm-python)** adds a `llm python` command for running a Python interpreter in the same virtual environment as LLM. This is useful for debugging, and also provides a convenient way to interact with the LLM {ref}`python-api` if you installed LLM using Homebrew or `pipx`.
 - **[llm-cluster](https://github.com/simonw/llm-cluster)** adds a `llm cluster` command for calculating clusters for a collection of embeddings. Calculated clusters can then be passed to a Large Language Model to generate a summary description.