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

@@ -31,7 +31,8 @@ again on the next run. Every download is decrypted on its way to disk.
 
 ## Getting Started
 
-The commands below need `git`, Node 22 or later and `yarn`.
+The commands below need `git`, `yarn` and Node 22.13 or later. Node 23 needs
+23.5 or later.
 
 ```bash
 git clone https://git.eeqj.de/sneak/quak.git
@@ -69,11 +70,29 @@ The library keeps a local copy of the account's album and file lists, the cache.
 It brings the cache up to date with the server in rounds called refreshes.
 
 quak is not published to a package registry: `package.json` marks it `private`,
-and `dist/` is not committed. Clone and build it as above, then add the clone to
-your own program's `package.json` by its path, for example
-`yarn add file:../quak`. The package's `main`, `types` and `exports` fields
-point into `dist/`, so the clone must be built first. The package is an ES
-module only, so a CommonJS program cannot `require` it.
+and `dist/` is not committed. Clone and build it as above, then link the clone
+into your own program:
+
+```bash
+# In the quak clone:
+yarn link
+
+# In your program's directory:
+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.
+`yarn link quak` does not add quak to your `package.json`, so run it again in
+each new checkout of your program.
+
+The package's `main`, `types` and `exports` fields point into `dist/`, so the
+clone must be built first. The package is an ES module only, so a CommonJS
+program cannot `require` it.
 
 ```ts
 import { Client, Library } from "quak";
@@ -671,9 +690,6 @@ but letters and digits, or when it is longer than 16 characters.
 When the date or the time zone changes, the next run stores the original at its
 new path and leaves the old copy where it is.
 
-A file deleted in Ente keeps its original at its save path, and the JSON beside
-it. The next run removes its symlinks from the collection directories.
-
 The library gives the same path as `photo.savePath` and writes it with
 `photo.download()` (see "A photo's content").
 

package.json

@@ -12,7 +12,7 @@
     "private": true,
     "type": "module",
     "engines": {
-        "node": ">=22"
+        "node": "^22.13.0 || >=23.5.0"
     },
     "main": "./dist/src/index.js",
     "types": "./dist/src/index.d.ts",