Auto-Remediation - Show available solutions in Project Security Dashboard - Display basic info in activity column - Frontend

• Main issue: #258800 (closed)
• Parent issue: #258801 (closed)
• backend counterpart: #258802 (closed)

Implementation plan

• Extend the client-side GraphQL fragment to include available solutions and open Merge Requests (including the distinction between manual MRs and autofix ones).
• Based on the fetched data, display the lightbulb icon in the Activity column when a vulnerability has available solutions.
• The lightbulb icon triggers a tooltip on hover. Copy: Auto-fix solution available.

PM Notes

An OKR is to make sure everything is pajamas, can we make sure to use pajamas and if pajamas doesn't have a pattern for what we are adding, contribute one? this may make this a heavier weight but as an OKR it's a high priority.