Ragatouille

Minor fixes&improvements release.

Community contribs:
- https://github.com/bclavie/RAGatouille/issues/103 fixes **properly** pushed to main thanks to bjsi
- Better verbosity handling https://github.com/bclavie/RAGatouille/pull/112 by Potrock
- Metadata support in Langchain integration https://github.com/bclavie/RAGatouille/pull/104 by GMartin-dev

- Fix newly introduced dependency issue

- Fixes sometimes skipped shuffling of training triplets
- Fixes accidental duplicates when input training data has many more positives than negatives.
- Bump to `colbert-ai` 0.2.18, fully removing multiprocessing calls when indexing

Fixes & minor improvements:
- Better verbosity control, especially for high-CRUD encode() scenarios
- Fixed max document length being often set too low when using in-memory encode() or rerank()
- Allow forced overwrite of indexes (https://github.com/bclavie/RAGatouille/issues/63)
- Fix wrong argument being passed to negative miner (should not have had any impact in practice)

Initial "proper" release. Changelogs begin now.

- In-memory encodings support: store document embeddings in `RAGPretrainedModel` to be queried without an index