Netbox-contract

This version is identical to v2.0.12 which could not be published to the Pypi repository.

* [123](https://github.com/mlebreuil/netbox-contract/issues/123) prepare plugin to [Netbox 4.0 migration](https://docs.netbox.dev/en/feature/plugins/development/migration-v4/).
* [125](https://github.com/mlebreuil/netbox-contract/issues/125) Cleanup direct reference to Circuits in the Contract model. Correct database inconsistencies related to the ContractAssignment object renaming.

* [115](https://github.com/mlebreuil/netbox-contract/issues/115) API correction for contract external partie
* [117](https://github.com/mlebreuil/netbox-contract/issues/117) Tenant and accounting dimensions optional
* [119](https://github.com/mlebreuil/netbox-contract/issues/119) Add a Yearly recuring cost, read only, calculated field for contract
* [15](https://github.com/mlebreuil/netbox-contract/issues/105) AQuick serach limited to active contracts

* [107](https://github.com/mlebreuil/netbox-contract/issues/107) Add the contacts tab to the service provider detail view.
* [111](https://github.com/mlebreuil/netbox-contract/issues/111) Correct assignment spelling.

* [42](https://github.com/mlebreuil/netbox-contract/issues/42) Allow the selection of either providers or Service providers as contract third parties.
* Removed all reference to the direct assignment of circuits to contracts
* [88](https://github.com/mlebreuil/netbox-contract/issues/88) Add a placeholder value to the accounting dimensions jsonfield. This placeholder vale con be configured as part of the PLUGINS_CONFIG parameter in the configuration.py file (see above)
* [89](https://github.com/mlebreuil/netbox-contract/issues/89) add the possibility to link contracts to sites and virtual machines.
* [99](https://github.com/mlebreuil/netbox-contract/issues/99) list child contracts in on the parent view.

* [91](https://github.com/mlebreuil/netbox-contract/issues/91) Replace deprecated ( in netbox version 3.6) MultipleChoiceField.
* [48](https://github.com/mlebreuil/netbox-contract/issues/48) Allow other plugin to inject visual in contract and invoice forms.
* [89] (https://github.com/mlebreuil/netbox-contract/issues/89) Add contract assignment to virtual machines.

* [85](https://github.com/mlebreuil/netbox-contract/issues/85) Fix missing fields contract and invoice import and export forms.