Repomix Desktop v1.1.0

1. Report generation no longer feels frozen on large repos.

• The Repomix run was moved off the main UI thread so the app stays responsive while generating a report. The app no longer briefly freezes upon generation with very large repos.
• While a report is running, the buttons are disabled so the user can't spam actions to trigger overlapping runs.

2. The app would previously call report generation "successful" when it was finished, whether the report was there or not.

• After generation, the app checks whether the output file actually exists and actually has content.
• Empty or missing files no longer get treated as a normal success.

3. The old plain success message was replaced with a custom success dialog.

• The generic success popup was replaced with one that matches the app.
• The dialog includes an "Open Folder"" action so the user can immediately jump to the folder that has the file in it.

4. Error reporting to the user was fixed and improved

• Errors were already being captured internally, but they weren't being shown to the user in most cases. That's fixed now.