docs: added entity reference (#2047)

* added entity reference

* chore: added github action

* added link to reference

docs/content/references/entities/classes/CustomerGroup.md

@@ -0,0 +1,131 @@
+---
+displayed_sidebar: entitiesSidebar
+---
+
+# Class: CustomerGroup
+
+## Hierarchy
+
+- `SoftDeletableEntity`
+
+  ↳ **`CustomerGroup`**
+
+## Constructors
+
+### constructor
+
+• **new CustomerGroup**()
+
+#### Inherited from
+
+SoftDeletableEntity.constructor
+
+## Properties
+
+### created\_at
+
+• **created\_at**: `Date`
+
+#### Inherited from
+
+SoftDeletableEntity.created\_at
+
+#### Defined in
+
+[interfaces/models/base-entity.ts:16](https://github.com/medusajs/medusa/blob/0703dd94e/packages/medusa/src/interfaces/models/base-entity.ts#L16)
+
+___
+
+### customers
+
+• **customers**: [`Customer`](Customer.md)[]
+
+#### Defined in
+
+[models/customer-group.ts:18](https://github.com/medusajs/medusa/blob/0703dd94e/packages/medusa/src/models/customer-group.ts#L18)
+
+___
+
+### deleted\_at
+
+• **deleted\_at**: ``null`` \| `Date`
+
+#### Inherited from
+
+SoftDeletableEntity.deleted\_at
+
+#### Defined in
+
+[interfaces/models/soft-deletable-entity.ts:7](https://github.com/medusajs/medusa/blob/0703dd94e/packages/medusa/src/interfaces/models/soft-deletable-entity.ts#L7)
+
+___
+
+### id
+
+• **id**: `string`
+
+#### Inherited from
+
+SoftDeletableEntity.id
+
+#### Defined in
+
+[interfaces/models/base-entity.ts:13](https://github.com/medusajs/medusa/blob/0703dd94e/packages/medusa/src/interfaces/models/base-entity.ts#L13)
+
+___
+
+### metadata
+
+• **metadata**: `Record`<`string`, `unknown`\>
+
+#### Defined in
+
+[models/customer-group.ts:26](https://github.com/medusajs/medusa/blob/0703dd94e/packages/medusa/src/models/customer-group.ts#L26)
+
+___
+
+### name
+
+• **name**: `string`
+
+#### Defined in
+
+[models/customer-group.ts:13](https://github.com/medusajs/medusa/blob/0703dd94e/packages/medusa/src/models/customer-group.ts#L13)
+
+___
+
+### price\_lists
+
+• **price\_lists**: [`PriceList`](PriceList.md)[]
+
+#### Defined in
+
+[models/customer-group.ts:23](https://github.com/medusajs/medusa/blob/0703dd94e/packages/medusa/src/models/customer-group.ts#L23)
+
+___
+
+### updated\_at
+
+• **updated\_at**: `Date`
+
+#### Inherited from
+
+SoftDeletableEntity.updated\_at
+
+#### Defined in
+
+[interfaces/models/base-entity.ts:19](https://github.com/medusajs/medusa/blob/0703dd94e/packages/medusa/src/interfaces/models/base-entity.ts#L19)
+
+## Methods
+
+### beforeInsert
+
+▸ `Private` **beforeInsert**(): `void`
+
+#### Returns
+
+`void`
+
+#### Defined in
+
+[models/customer-group.ts:28](https://github.com/medusajs/medusa/blob/0703dd94e/packages/medusa/src/models/customer-group.ts#L28)