[owners] Add OWNERs files to rapidjson

Bug: 78484
Change-Id: Ie16482d8a146ddcdbed7711237a475cb4fa43945
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/rapidjson/+/541562
Reviewed-by: Corey Tabaka <eieio@google.com>
Reviewed-by: Shai Barack <shayba@google.com>
diff --git a/OWNERS b/OWNERS
new file mode 100644
index 0000000..334dbad
--- /dev/null
+++ b/OWNERS
@@ -0,0 +1,3 @@
+eieio@google.com
+brunodalbo@google.com
+cfontas@google.com