Describe the bug
Discarding a bunch of files can take a long time and the UI is frozen during the operation.

To Reproduce
Steps to reproduce the behavior:

1. Select a decent amount of files (for example a package in node_modules that you don't need anymore)
2. Press d to discard

Expected behavior
The UI should not lock up. Ideally this operation should be quick but if this is a limitation of git then I would like the operation to happen in the background or at least get some indication telling me that something is happening.

Version info:
Run lazygit --version and paste the result here
commit=6705428a8df4ef3480e8d03a2f5efc87129f0c42, build date=2025-05-22T12:59:02Z, build source=binaryRelease, version=0.51.0, os=linux, arch=amd64, git version=2.48.1

Run git --version and paste the result here
git version 2.48.1

Additional context
I'm on Ubuntu 25.04

Note: please try updating to the latest version or manually building the latest master to see if the issue still occurs.