Add per-declaration tactic usage data (235,586 declarations, extracted via jixia)

.gitattributes

@@ -61,3 +61,4 @@ nodes.csv filter=lfs diff=lfs merge=lfs -text
 edges.csv filter=lfs diff=lfs merge=lfs -text
 mathlib_nodes.csv filter=lfs diff=lfs merge=lfs -text
 mathlib_edges.csv filter=lfs diff=lfs merge=lfs -text
+tactic_usage.ndjson filter=lfs diff=lfs merge=lfs -text

tactic_usage.ndjson

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3927807af5920b626b687565f415233219df017b5b1555a074a073809bff4f84
+size 45050618