Draft: Migrate snippets nav tabs from HAML to Vue

What does this MR do and why?

This MR migrates the tab implementation in app/views/snippets/_snippets_scope_menu.html.haml from HAML to Vue

Screenshots or screen recordings

Before	After

How to set up and validate locally

• Browse to project snippets and click through the tabs
• http://localhost:3000/flightjs/Flight/-/snippets

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 #230762 (closed)