Add "Accept Changes" button to directly accept external modification

[NYH-Dolphin]

Adds "Accept Changes" button to directly accept external modify when Jabref detects the library has been modified by another program

This is a Re-pull request related to #8235

• [x] Change in CHANGELOG.md described in a way that is understandable for the average user (if applicable)
• [ ] Tests created for changes (if applicable)
• [x] Manually tested changed features in running JabRef (always required)
• [x] Screenshots added in PR description (for UI changes)
• [x] Checked developer's documentation: Is the information available and up to date? If not, I outlined it in this pull request.
• [x] Checked documentation: Is the information available and up to date? If not, I created an issue at https://github.com/JabRef/user-documentation/issues or, even better, I submitted a pull request to the documentation repository.

Screenshots of UI changes