Editora 0.9.10. Archived, so links from that release keep working. Read the 0.18.5 page →
Typst: Bold
typst.bold Wrap the selection in *bold* markup.
How to run it
Open the command palette (M-x in the Emacs keymap) and search for Typst: Bold, then press Enter. It has no default keybinding, but you can bind one in Settings → Keymaps.