refactor: POS Invoice merging and cancellation (#24351)

* feat: pos invoice merging with background jobs

* fix: invoice threshold for queueing job

* refactor: cancellation flow of point of sale

* feat: tests for cancellation of pos closing

Co-authored-by: Marica <maricadsouza221197@gmail.com>

erpnext/controllers/status_updater.py

@@ -93,6 +93,12 @@ status_map = {
 		["Open", "eval:self.docstatus == 1 and not self.pos_closing_entry"],
 		["Closed", "eval:self.docstatus == 1 and self.pos_closing_entry"],
 		["Cancelled", "eval:self.docstatus == 2"],
+	],
+	"POS Closing Entry": [
+		["Draft", None],
+		["Submitted", "eval:self.docstatus == 1"],
+		["Queued", "eval:self.status == 'Queued'"],
+		["Cancelled", "eval:self.docstatus == 2"],
 	]
 }