refactor(treewide): formatting and ruff fixes, + manually enabled F401

Signed-off-by: Akhil Narang <me@akhilnarang.dev>
diff --git a/erpnext/__init__.py b/erpnext/__init__.py
index 1c1c10c..7a8ff19 100644
--- a/erpnext/__init__.py
+++ b/erpnext/__init__.py
@@ -37,9 +37,7 @@
 	if not frappe.flags.company_cost_center:
 		frappe.flags.company_cost_center = {}
 	if company not in frappe.flags.company_cost_center:
-		frappe.flags.company_cost_center[company] = frappe.get_cached_value(
-			"Company", company, "cost_center"
-		)
+		frappe.flags.company_cost_center[company] = frappe.get_cached_value("Company", company, "cost_center")
 	return frappe.flags.company_cost_center[company]