Use Vue router when navigating from Blob to Tree

Description:

Currently, navigating from the blob view to the tree view triggers a full page refresh because the blob entrypoint (_blob.html.haml) does not pass the required data for the tree view to render. As a result, we use <a href> for navigation instead of <router-link to> within our Vue application.

We should explore a solution to pass the necessary data from the blob entrypoint (_blob.html.haml) to the tree view, enabling the use of for navigation. This change would improve the user experience by providing faster navigation and reducing unnecessary page reloads.