Two lead assessor

Add assessor location

Fix: Dependencies update

Introduced new login with PIN flow in the application. Integrated 'image_picker' & 'image_cropper' extension to take a picture or select a picture from gallery & crop the selected picture respectively. Created a bottom popup to display both the options to user on clicking on camera icon.

Fixed issues in the login & create pin flow. Created customized widget for the pin, existing one was having issues.