Executing notebooks with %load and other IPython magic commands

Hi! I'm seeing different behavior in how nbclient handles inline magics.
It's cool with `%%bash` but won't execute `%load`.

Is that something that could be addressed?

## What happens after running nbclient

## What happens when running in Jupyter (what I'd like nbclient to do)

Notebook:

```
{
"cells": [
{
"cell_type": "code",
"execution_count": null,
"id": "4547",
"metadata": {},
"outputs": [],
"source": [
"%%bash\n",
"pwd"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "7184",
"metadata": {},
"outputs": [],
"source": [
"%load https://raw.githubusercontent.com/liquidcarbon/puppy/main/examples/Q-strings/Q.py"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "bc1947e4-a990-4e54-8bd4-a3abb9ff2baa",
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
"kernelspec": {
"display_name": "ducks-pandas-3.12",
"language": "python",
"name": "ducks-pandas-3.12"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.12.3"
}
},
"nbformat": 4,
"nbformat_minor": 5
}
```

Reproduce the supplied notebook with nbclient, comparing execution of the %%bash and %load cells with the behavior described for Jupyter. Trace the notebook execution entry point to determine where inline magic handling differs; done means %load executes as expected while the existing %%bash behavior remains intact.

Written by the indexing model from the issue text.