Syntax highlighting for .slow files. SlowLang executes as Python, so the
grammar is the built-in Python grammar plus the please() keyword
(scoped keyword.other.slowlang).
Publish (one-time, needs a publisher account)
Create a publisher at https://marketplace.visualstudio.com/manage
(sign in with a Microsoft account, create an Azure DevOps org when asked,
publisher ID sebin-gg to match package.json).
npm i -g @vscode/vsce then vsce login sebin-gg (paste a DevOps PAT
with Marketplace > Manage scope).
From this directory: vsce package then vsce publish.
Mirror to Open VSX: first publication needs an Eclipse account, the
Eclipse Foundation Publisher Agreement signed, and the sebin-gg
namespace created at https://open-vsx.org (link it via your GitHub
account). Then npx ovsx publish -p <token>.
