add readme, add prettier fmt target in makefile

Makefile

@@ -5,3 +5,4 @@ run:
 
 fmt:
 	go fmt *.go
+	prettier -w data

README.md

@@ -0,0 +1,9 @@
+# curiosa.io scraper
+
+This is a scraper for the API at curiosa.io.
+
+Included in the repository are json data files representing every SCR card.
+
+# License
+
+WTFPL for `\*.go` files.