Upgrade Tauri from v1 to v2

[ndpm13]

Description

The other PR brings way too many changes and adds unnecessary deps. I've tested this on a Void Linux system since I can't run mainline cinny-desktop on it (due to some libsoup/javascriptcore errors).

Fixes #398

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Checklist:

• [ ] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings