feat: Add jan provider extensions for mobile

[Vanalite]

Describe Your Changes

• Duplicate Jan provider to tauri extensions (we should remove extensions-web, only use Tauri approach with platform-based conditional code to handle implementation on each platform)
• Jan provider is now available on mobile
• Jan provider for mobile is now packed in pre-install

Fixes Issues

• Closes feat: Jan Mobile has Jan provider #6573
• Closes #

Self Checklist

• Added relevant comments, esp in complex areas
• Updated docs (for bug fixes / features)
• Created issues for follow-up changes or refactoring needed

[github-actions]

Barecheck - Code coverage report

Total: 30.37%

Your code coverage diff: -0.02% ▾

Uncovered files and lines

File	Lines
web-app/vite.config.ts	1-8, 11-14, 16, 18-19, 21-22, 34, 40-43, 46, 48, 50-98, 100, 102-111, 116, 118-129, 131-136
web-app/src/services/core/mobile.ts	9, 11-12, 14, 18-20, 25-27, 32-35, 40-43, 48-56, 58-65, 67-88