Add Flexible Explorer Toolbars Deluxe mod (#4745)

This mod allows the Search Bar, Breadcrumb Bar, and Up Button in Windows Explorer to be movable toolbars, enhancing user customization.

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## Changelog

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* Changelog item 1...
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## Mod authorship

If this pull request introduces a new mod, please complete the section below.

This mod was created by:

- - [ ] The submitter, without AI assistance
- - [x] The submitter, with AI assistance
- - [x] Claude
- - [ ] ChatGPT
- - [ ] Gemini
- - [x] Another AI (please specify): Muse Spark
- - [ ] Other (please specify): 

Please select the options that best apply. Your selection does not affect the acceptance criteria, but it helps reviewers understand the context of the code and provide relevant feedback.

Author: Anixx