adding License notice

[ChristopheLallement]

Hello

I open this ticket to propose a Pull-request concerning the licenses.
We would like to use your project as part of an open-source project and we must comply with license law.
There are two aspects the license of fastapi_client code and the license of the generated code.

1. License of the project
   For the moment since there is no license the default copy copyright law applies, no one may reproduce, distribute, or create derivative works. source GitHub documentation

2. License of the generated code
   Since the project doesn't have any license yet, the default copyrights apply to the template. By consequence the generated code include some copyrighted code. In my understanding nobody can use eventually the generated code.

For these reasons, could you consider adding :

• A license in the project
• A notice about the generated code licence.

I could take charge of the modification and the Pull-request.
Will you accept a pull request to do same as openapi-generator did regarding the license ?

Openapi-generator is under apache 2.0 license and the project contains the following notice :

3.4 - License information on Generated Code
The OpenAPI Generator project is intended as a benefit for users of the Open API Specification. The project itself has the License as specified. In addition, please understand the following points:

The templates included with this project are subject to the License.
Generated code is intentionally not subject to the parent project license
When code is generated from this project, it shall be considered AS IS and owned by the user of the software. There are no warranties--expressed or implied--for generated code. You can do what you wish with it, and once generated, the code is your responsibility and subject to the licensing terms that you deem appropriate.
source

Thanks
Christophe

[dmontagu]

Sorry for the delay!

[ChristopheLallement]

Thanks you David