Send fork ahead/behind links to frontend
What does this MR do and why?
They will be used to link a user from fork to a compare page
Related issue: #384165 (comment 1244589329)
Related MR: !108761 (merged)
They will be used to link a user from fork to a compare page
Related issue: #384165 (comment 1244589329)
Related MR: !108761 (merged)