Add analytics setup function

Description

To provide a paved path to provide analytics, we want to have a standard mechanism to initialise google analytics for a web application.

Further details

Don't replicate what is already happening in the DA team.

This should not rely on React or assume that React is in use.

Task list

Acceptance criteria

• Create or get user account identity for google analytics.
• Single setup mechanism can be applied to an example webpage and connects to google analytics account.