bench: Add texray span output (#66)

Author: samuelburnham

Cargo.lock

@@ -34,6 +34,8 @@ p3-util = { git = "https://github.com/Plonky3/Plonky3", rev = "e9d75614dd6816f9b
 criterion = "0.5"
 p3-baby-bear = { git = "https://github.com/Plonky3/Plonky3", rev = "e9d75614dd6816f9b5dbb4413c69be63536efd64" }
 rand = "0.10"
+tracing-subscriber = "0.3"
+tracing-texray = { git = "https://github.com/argumentcomputer/tracing-texray", rev = "465bbca0bea4721e58419c11cabd8cce21757822" }
 
 [[bench]]
 name = "multi_stark"