* Docs and shape of register_fragment_loaders hook, refs #863
* Update docs for fragment loaders returning a list of FragmentString
* Support multiple fragments with same content, closes#888
* Call the pm.hook.register_fragment_loaders hook
* Test for register_fragment_loaders hook
* Rename FragmentString to Fragment
Closes#863
* Embeddings plugin hook + OpenAI implementation
* llm.get_embedding_model(name) function
* llm embed command, for returning embeddings or saving them to SQLite
* Tests using an EmbedDemo embedding model
* llm embed-models list and emeb-models default commands
* llm embed-db path and llm embed-db collections commands
Simon Willison