Make mod watchdog public. (#190)

## 📝 Summary

Allows reuse of the watchdog func.

## 💡 Motivation and Context

I love to share.

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## ✅ I have completed the following steps:

* [x] Run `make lint`
* [x] Run `make test`
* [ ] Added tests (if applicable)

crates/rbuilder/src/live_builder/mod.rs

@@ -6,7 +6,7 @@ pub mod config;
 pub mod order_input;
 pub mod payload_events;
 pub mod simulation;
-mod watchdog;
+pub mod watchdog;
 
 use crate::{
     building::{