Frontend: Create a README for pipeline mini graph
What does this MR do and why?
Adding a README for developers who would like to use the pipeline mini graph.
| Task | MR |
|---|---|
| Move legacy files to new directory | !154625 (merged) |
| Move remaining pmg legacy code to legacy directory | !154818 (merged) |
| Create README for PMG |
|
Edited by Briley Sandlin