Add a silly quote to design_notes

… because why not and it felt appropriate. (And I am worried it will be
appropriate when somebody actually uses the code from
birdvisu/maps_new.py)

design_notes/README.md

@@ -2,3 +2,8 @@ A few files related to the design. Currently notes for myself, which do not
 necessarily make sense without implicit context.
 
 One day, we should have a proper `docs` directory with coherent documentation.
+
+---
+
+> Great design requires great workarounds.
+> 	— [craftyguy in `#main:postmarketos.org`](https://matrix.to/#/!zpvMifoucHSiUsVFgl:postmarketos.org/$3jZVEA-rQFeQgg8NPKzW1gD7rBU3aX7O8W7NeVCtZNo?via=matrix.org&via=tchncs.de&via=kde.org), with a small change by me.