jupyterlite: `%load` and `%recall` magic not working

Description

When using %load magic, either with a local relative path like:

%load ../solutions/02_01.py

or absolute URL like:

%load https://github.com/HumbleData/online-workshop/raw/main/content/solutions/02_01.py

It produces an error:

ValueError: '../solutions/02_01.py' was not found in history, as a file, url, nor in the user namespace.

or

URLError: <urlopen error unknown url type: https>

It was working in local jupyter notebook.

Reproduce

1. Go to http://humbledata.org/online-workshop/
2. Open one of the notebooks in notebook/
3. try running one of the cells with %load magic

Expected behavior

Same or similar experience as local Jupyter notebook. If relative path is not available due to limitation of WASM environment, at least let the absolute URL work

Context

• JupyterLite version:
• Operating System and version:
• Browser and version:

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