Resolves https://github.com/microsoft/playwright/issues/31847 by adding
playwright config's `baseURL` value to the `context-options` trace
event, and showing that in the Trace Viewer.
Because the added property is optional, I didn't increment the trace
format version.
I've also considered pulling the `baseURL` from the existing
`browser.newContext` step to get around modifying the trace format, but
that felt pretty hacky.
https://github.com/user-attachments/assets/ecaef747-727d-4937-9ca3-1605ca9907b9
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Signed-off-by: Simon Knott <info@simonknott.de>
Co-authored-by: Dmitry Gozman <dgozman@gmail.com>
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