Secondary: Automated time selection

[mvttchan]

User Story

As a [secondary user], I would like [the app to choose a best time for me according to both mine and the primary user's schedule] so that [I will not have to agonize over picking a time].

Detailed Description

For when a secondary user is indecisive or could not care less about when to meet. This is merely a quality of life feature.

Acceptance Criteria

• Given I opened an invitation link, there should be an option to automatically fill out the earliest time slot for us both to meet