What type of PR is this? (check all applicable)

• [ ] Refactor
• [ ] Feature
• [x] Bug Fix
• [ ] Optimization
• [ ] Documentation Update

Description

I noticed how a bunch of my bookmarks to Blazer queries are broken because they point to /internal which is now called /admin. Prompted also by @michael-tharrington's post here on forem.dev I added redirections for the old /internal links.

QA Instructions, Screenshots, Recordings

• Fire up the branch
• point it to localhost:3000/internal/blazer which should redirect to localhost:3000/admin/blazer or localhost:3000/internal which will redirect to localhost:3000/admin which will redirect to localhost:3000/admin/articles :)

Added tests?

• [ ] yes
• [x] no, because they aren't needed
• [ ] no, because I need help