* basic implementation of an /share?msg=foo endpoint
* SharePayload
* add sharing html & md while we're at it
* remove whitespace from imports to appease linter
* lint
* Add unit test
* More tests
* Test for showScreen
* Use one of the typed strings
* Test nasty tags stripped out
* Add playwright test
* Fix flake
by not relying on the name being synced as soon as we load
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Co-authored-by: David Baker <dbkr@users.noreply.github.com>