feat: [BE] Implement Factory Settings

[hantran-co]

Epic: Files & Links https://github.com/orgs/janhq/projects/5/views/16?pane=issue&itemId=49509878 Related design ticket: #1052 Related FE task: #1620

Goal

Allow users to reset to factory default settings

Design

Full design flow: https://www.figma.com/file/ytn1nRZ17FUmJHTlhmZB9f/Jan-App?type=design&node-id=2462-97626&mode=design&t=bQyiFG80Dcr1XlBm-4

User flow

1. Go to Settings / Advanced Settings
2. See Reset to Factory Default
3. Users can click on Reset button to reset app settings to its original state & delete all usage data.

4. Confirmation after clicking on Reset

[namchuai]

@Van-QA , please help to verify this feature. Thank you!

[Van-QA]

Completed the testing on Jan v0.4.5-224