Group5 draft

[Domudu]

• Change in CHANGELOG.md described in a way that is understandable for the average user (if applicable)
• Tests created for changes (if applicable)
• Manually tested changed features in running JabRef (always required)
• Screenshots added in PR description (for UI changes)
• Checked developer's documentation: Is the information available and up to date? If not, I outlined it in this pull request.
• 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.

Summary

This change adds a series of ADT to realize the function of adding search history.It is a fix for JabRef#7906 .

Details

This part of the contribution contains basic classes, which are used to save search history, record, modify and query search history.

The search history is added on the original basis, and the following functions are supported:

1. record search history
2. browse search history
3. query of specific search history
4. delete search history

Since there are no UI changes in the PR,I did not change CHANGELOG.md.