Set up Vale in this repository

When to use this

The repository has no .vale.ini, or has one that does not resolve. If a working config already exists, the user probably wants fix or triage instead — check before writing anything.

Prerequisites

1. vale ls-config — if it resolves, a config already exists. Fix what it reports rather than starting over, and say that is what you are doing.
2. Know where the prose lives. Ask if it is not obvious.

Workflow

1. Install if vale --version fails: brew install vale, choco install vale, or a binary from https://docs.vale.sh/topics/installation.md.