3bfdf2fa

By: Lucien Huber <im@lcnbr.ch>

update the Symbolica Typst plugin to upstream main

User request: "yeah lets update to main. Also what is the license situation for symbolica keys? currently?"
Approved follow-up: "Approve these protocol test updates" for
/tmp/plugin-main-update/test-protocol.patch.

Pin upstream main at 18e0491628f9eac5c788659cabfcdb7575f6986d,
migrate to symbolica-typst-atom-payload and the matching Typst protocol,
and validate native, Python and WebAssembly interoperability locally.