Addec context variables for contacts to docs (#5834)

* Corrected report mixin example

* Remove unused file

* Added context variables for company and address

* Repair link in file

* Repair link in file

* Repair link in file

* Removed blank

* Added context variables for contacts to docs

* Typo in link

* Update .pre-commit-config.yaml

Revert version

* Delete InvenTree/order/migrations/0099_auto_20231101_1747.py

* Delete InvenTree/part/migrations/0119_auto_20231101_1747.py

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Co-authored-by: Oliver <oliver.henry.walters@gmail.com>

docs/docs/report/context_variables.md

@@ -191,6 +191,19 @@ Each part object has access to a lot of context variables about the part. The fo
 | postal_city | City name |
 | country | Country name |
 
+#### Contact
+
+Contacts are added to companies. Actually the company has no link to the contacts.
+You can search the company object of the contact.
+
+| Variable | Description |
+|----------|-------------|
+| company | Company object where the contact belongs to |
+| name | First and second name of the contact |
+| phone | Phone number |
+| email | Email address |
+| role | Role of the contact |
+
 #### SupplierPart
 
 | Variable | Description |

docs/docs/report/purchase_order.md

@@ -28,6 +28,7 @@ In addition to the default report context variables, the following variables are
 | order.target_date | The date when the order should arrive |
 | order.if_overdue | Boolean value that tells if the target date has passed |
 | order.currency | The currency code associated with this order, e.g. 'AUD' |
+| order.contact | The [contact](./context_variables.md#contact)  object associated with this order |
 
 #### Lines