V0.46

New changes:

• Ability to add metadata and display them on a plot
• Fix bugs with Mistral Generation
• Add FlagEmbedding
• Remove Chroma
• Add tokens count
• Sample documents to improve the terms extraction process
• Save and load Bunka objects
• load embeddings into Bunka
• Ability to add your own projection model (TSNE, PCA, UMAP etc)
• Add outliers detection
• automatic language detection