Make demo for Access Management solution

### Description

Like the inbox, the access management solution should have a storybook demo for displaying its use of components in a realistic-ish context.

Relevant pages for the demo is (to start with) the overview of an organization's users, with at least one example such a user's accesses.
Implement using the currently available components, sunstituting any Design system component with Altinn components.

Any lacking component may be left as-is to illustrate any issues


### Additional Information

_No response_

Start in the Storybook demos and the existing Access Management components, using the inbox demo as a reference for structure and realism. Build an overview of an organization's users with at least one user's accesses, using available Altinn components in place of Design system components where possible. The demo is done when the overview can be displayed in Storybook and any unavailable components are left visibly as-is.

Written by the indexing model from the issue text.