Example script: download every album's photos and metadata (closes #144)

`examples/download-albums.ts` logs in with `QUAK_EMAIL` and `QUAK_PASSWORD`,
opens the library, and for every album downloads each photo to its save path,
writes `{savePath}.json` with the photo's record (cache paths left out) and its
EXIF fields, and writes `albums/{collectionID}.json` with the album's save
paths. A JSON file is written only when its content changed, so a second run
downloads and rewrites nothing. `tsconfig.json` includes `examples/`, so the
build type-checks it. A test runs it twice against a stand-in account.

Model: opus-5-5

tsconfig.json

@@ -18,5 +18,5 @@
         "sourceMap": true,
         "resolveJsonModule": true
     },
-    "include": ["src/**/*", "bin/**/*"]
+    "include": ["src/**/*", "bin/**/*", "examples/**/*"]
 }