chore: reorganize docs apps (#7228)

* reorganize docs apps

* add README

* fix directory

* add condition for old docs

www/apps/resources/references/modules/pricing_models/page.mdx

@@ -0,0 +1,38 @@
+---
+displayed_sidebar: pricingModelReference
+slug: /references/pricing/models
+---
+
+import { TypeList } from "docs-ui"
+
+# Pricing Module Data Models Reference
+
+This documentation provides a reference to the data models in the Pricing Module
+
+## Relations Overview
+
+```mermaid
+erDiagram
+	Price }|--|{ PriceSet : price_set
+	Price ||--|| PriceRule : price_rules
+	Price }|--|{ PriceList : price_list
+	PriceList ||--|| PriceListRule : price_list_rules
+	PriceList }|--|{ RuleType : rule_types
+	PriceListRule }|--|{ RuleType : rule_type
+	PriceListRule ||--|| PriceListRuleValue : price_list_rule_values
+	PriceRule }|--|{ PriceSet : price_set
+	PriceRule }|--|{ RuleType : rule_type
+	PriceSet }|--|{ RuleType : rule_types
+
+```
+
+## Classes
+
+- [PriceListRuleValue](../../pricing_models/classes/pricing_models.PriceListRuleValue/page.mdx)
+- [PriceListRule](../../pricing_models/classes/pricing_models.PriceListRule/page.mdx)
+- [PriceList](../../pricing_models/classes/pricing_models.PriceList/page.mdx)
+- [PriceRule](../../pricing_models/classes/pricing_models.PriceRule/page.mdx)
+- [PriceSetRuleType](../../pricing_models/classes/pricing_models.PriceSetRuleType/page.mdx)
+- [PriceSet](../../pricing_models/classes/pricing_models.PriceSet/page.mdx)
+- [Price](../../pricing_models/classes/pricing_models.Price/page.mdx)
+- [RuleType](../../pricing_models/classes/pricing_models.RuleType/page.mdx)