* Adding a null check to prevent infinite next button loading on account selection page.
* Remove a useless validation in migration cutover page
* Fixed some component formatting in source selection page
* Completely updated target selection page UX according to latest figma mockup
* Adding confirmation for migration cutover and cancel
* migration vbump
* azdata vbump in migration extension
* letting users do a cutover with unrestored files
* Fixing some localized strings
* Adding readme file for migration extension.
* Adding a static link for readme gif
* added sql mi typing, localized strings, some null checks
* casting target instance as sql mi
