Refactor fork info into .Vue component

What does this MR do and why?

Refactor fork info into .Vue component

It is needed as further changes for this component will require real-time updates.

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. enable :fork_divergence_counts FF
2. Go to any forked project or create new one
3. Play around with different scenarios: when fork is up to date, ahead, behind, fork of a fork, fork source deleted etc.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #382914 (closed)