feat: add more details when scanning

When adding a folder, the "scanning" status isn't very detailed and can take a lot of time with big folders, it would be nice if it was a bit more granular.

<img width="1896" height="900" alt="Image" src="https://github.com/user-attachments/assets/d1331d88-9581-404b-bd6c-2c78cb40253d" />

cc: @ethanndickson 