Node 22.13 minimum, and the library linked to its clone (closes #239)

`engines.node` and the README now state the minimum that quak's
`yarn.lock` needs: Node 22.13, or 23.5 on Node 23. `@inquirer/prompts`
and its packages refuse 23.0 to 23.4.

"Using the library" now links the clone with `yarn link` instead of
`yarn add file:../quak`. A linked quak runs on the dependencies the clone
installed from `yarn.lock`; `file:` resolved them afresh, so a new
upstream release could raise the Node minimum without any change here.

Model: opus-5-5

README.md

@@ -81,6 +81,9 @@ yarn link
 yarn link quak
 ```
 
+`yarn link` also installs the `quak` command in yarn's global bin directory, and
+`yarn unlink` in the clone removes the link and the command.
+
 A linked quak uses the dependencies that `yarn install` put in the clone, at the
 versions in quak's `yarn.lock`. Avoid `yarn add file:../quak`: it resolves
 quak's dependencies again, and their newer releases can need a newer Node.