Add hot-reload config template

hot_config.json

@@ -0,0 +1,8 @@
+{
+  "_comment": "Edit this file to change training params without restart",
+  "_comment2": "Changes detected automatically every training step",
+  "save_every_sec": 43200,
+  "after_sft_steps": 80000,
+  "log_every_steps": 100,
+  "pause_training": false
+}