FE030: Show app version in settings and about screens

[gerrardwantah]

Ticket

• Ticket Code: FE030
• Ticket link: https://planner.cloud.microsoft/webui/plan/UEUbpaWU0UevC_rHoIGKsMgAEcsx/view/board/task/ney2Wc2xHUGvomCcrX7DkMgAK9NS?tid=d02378ec-1688-46d5-8540-1c28b5f470f6

Description

Changed version on about and settings screen, to take the version from app.json instead of a hardcoded string.

• Installed expo-constants
• Settings screen and About screen now display Constants.expoConfig.version (to get the version for app.json)
• Verified this also matches package.json's version field (both currently 1.0.0)

Note: Going forward, to bump the version all that is needed is just to change the 'version' in app.json, it will change the version on both settings and about screen

Checks

• All requirements of the ticket have been implemented, or I have commented on any exclusions
• Unit tests have been added or updated for any backend changes (if applicable)
• I have reviewed the Files Changed tab and verified it only contains relevant changes (comment if unsure about any)
• This PR has been reviewed and approved