[WIP] Localized Preferences revisited

[calixtus]

refs #8304

Mandatory checks

• [x] I own the copyright of the code submitted and I licence it under the MIT license
• [ ] 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.

[koppor]

We should take the time to create a good ADR of it. We should follow the template https://github.com/adr/madr/blob/develop/template/adr-template-bare.md

1. Have the option titles only in the list of "Considered Options"
2. Add section "Pros and Cons of the Options"
3. Create subsecton for each option
4. Move explaning text to each option
5. Add examples.

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