Allow GoAContainer to fit content width in addition to the existing 100% width

[chrisolsen]

The .goa-container flex css can updated to allow for dynamically setting it to prevent flex growth.

  .goa-container {
    box-sizing: border-box;
    display: flex;
    flex: 0 0 auto;   /** here **/
    flex-direction: column;
  }

The these changes:

Acceptance Criteria

1. New property that dictates how the container is sized (either full-width or to content)

[twjeffery]

From this thread in the support channel: https://goa-dio.slack.com/archives/C02PLLT9HQ9/p1714490521425969

[twjeffery]

This should not change the default size for existing containers, but allow override for this?