Feature: Retrieval functionality to attach document to user prompt

[mobile-is-mine]

New Feature: Attach Documents in Chat

Description

This PR adds a new functionality that allows users to import documents from their local storage and attach them as prompts in chat.

Motivation

Enhancing the user experience by enabling personalized responses based on imported documents.

Implementation Details

1. Embedding

• Used Ollama embedding model to embed the imported documents.

2. Storing Embedded Results

• Stored the embedded results using Swift Vector Database.
• You can find Swift Vector Database here.

How to Test

1. Go to the left sidebar.
2. Open the Retrieval Modal by clicking the "Retrieval" button.
3. Create a new database.
4. Import files from local storage.
5. Index the imported files.
6. Close the modal.
7. In the chat, click the document icon (left of the voice input icon).
8. Enable the "Use Document" option.
9. Select the database to use in chat.
10. Test chat functionality.

📸 Screenshots