Server side script report for sales analytics (#15589)

* Sales Analytics Report

* Codacy issue fixes and  name column addition

* Minor Fixes

* Minor Changes

* Codacy Issue Fixes

* Codacy Issue Fixes

* Bug Fixes

* Code cleaning and optimization

* Deleted Duplicate code

* Indentation Issue Fixes

* Added Supplier Condition

* Cleaned code and better function naming

* Added report link for sales analytics in selling.py

* fix(patch): Patch to delete old analytics reports

* feat(refactor): Created class and refactored code using object oriented paradigm

* Column condition fix

* Minor condition fix

* Minor fix

* parent child map for purchase analytics

* Minor Fixes in get_periodic_data

* Used dots for filters instead of brackets

* Minor Bug fix in get_period_date_ranges

* Test Cases for Analytics Report

erpnext/config/selling.py

@@ -185,10 +185,10 @@ def get_data():
 			"icon": "fa fa-table",
 			"items": [
 				{
-					"type": "page",
-					"name": "sales-analytics",
-					"label": _("Sales Analytics"),
-					"icon": "fa fa-bar-chart",
+					"type": "report",
+					"is_query_report": True,
+					"name": "Sales Analytics",
+					"doctype": "Sales Order"
 				},
 				{
 					"type": "page",