add a readme

Author: frewsxcv

README.md

@@ -0,0 +1,13 @@
+# ruby-coverage-guided-fuzzer
+
+PoC fuzzer written in Ruby for Ruby powered by Ruby’s built-in coverage library.
+
+```
+$ ruby run.rb examples/foo.rb
+Encountered new code path with input bytes:
+	bytes: "(\"\r\e\xB5A\xA3\xA4\xE6g"
+Encountered new code path with input bytes:
+	bytes: "1'\x9F\xA2\x18t\xD7\xC2WH"
+Encountered new code path with input bytes:
+	bytes: "0\xF4\xDA\x8D\xD83\xD8\xDE\xDD\x9F"
+```