Add workspace scopes to vscode settings

[signekb]

Following the conventional commits convention (type(scope): description), we (@lwjohnst86 and I) have talked about the need for some common workspace scopes in our projects. Especially, since we have a strong focus on documentation, the type docs seems too unspecific, when almost an entire repository, like the decisions repo, is documentation.

With the Conventional Commits VS Code extension, it's possible to set workspace scopes in .vscode/settings.json, which could help us use the same scopes across commits/PRs/team members.