A reference plugin for the remote dataset source framework that browses and
imports training images from a PixlStash server.
- Browse characters and picture sets, import selected groups as a dataset.
- Captions are built from each picture's natural-language description and WD14
tags, read per-picture from GET /pictures/{id}/metadata (the listing
endpoints only return scalar grid fields).
- Supports SSL and configurable API paths.
Also un-ignores extensions/pixlstash in .gitignore so the plugin is tracked.