[Woo POS] Make a WooLog.T for our project

[backwardstruck]

Per @malinajirka suggestion here:

"we might want to consider introducing a new Woo.T for POS to make the logs a bit easier to parse."

Currently, POS-related logs use general tags which can make it difficult to filter and parse logs related specifically to the POS features. By introducing a new Woo.T.POS tag, we can streamline the logging process and improve the maintainability and debugging process for the POS module.

[dangermattic]

🚫 Please add a type label (e.g. type: enhancement) and a feature label (e.g. feature: stats) to this issue.