TL;DR

Improved file suggestion search with better matching and increased result limits.

closes #505

What changed?

• Increased file display limit from 5 to 25 files
• Added a separate file fetch limit of 100 to retrieve more potential matches
• Implemented a dedicated fuzzy search for files using Fuse.js with appropriate weighting
• Added sorting logic to prioritize files that start with the query string
• Renamed FUSE_OPTIONS to COMMAND_FUSE_OPTIONS for clarity
• Created a new FileItem interface to better structure file data

How to test?

1. Open the message editor
2. Type a file reference (e.g., @file:)
3. Enter search terms and verify:
   • Up to 25 results are displayed (instead of 5)
   • Results are properly sorted with exact matches first
   • Fuzzy matching works correctly for partial file names

Why make this change?

The previous implementation limited file suggestions to only 5 results and lacked sophisticated search capabilities. This change enhances the user experience by providing more relevant file suggestions through improved search algorithms and displaying a more useful number of results.