Support hyperlink escape sequence (OSC 8)

[knuesel]

It would be great to show OSC 8 escape sequences as URLs instead of the control character gibberish.

For example executing print("\e]8;;http://example.com\e\\This is a link\e]8;;\e\\\n") shows

\e]8;;[http://example.com\e\This](http://example.com/e/This) is a link\e]8;;\e\

instead of a link like in a terminal.

The OSC 8 standard is relatively recent but already supported by many terminals and applications: https://github.com/Alhadis/OSC8-Adoption/

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[FoSuCloud]

You can see that the terminal of jupyterlab can achieve the expected results.
The definition of the OSC 8 project is "adoption in terminal emulators"
Is it necessary to support it in notebook?

[knuesel]

OSC 8 support in the notebook is necessary for correct display of cell outputs that include these escape sequences.

Currently some error messages look like this:

but they should look like this:

Note in the first image that Notebook already supports many escape sequences: the red foreground and dark background colors are correctly rendered. But the hyperlink is shown as duplicated URL mixed in with gibberish.