Add AUTHORS (#466)

We add the file `AUTHORS` to clearly list the authors bearing the
copyright.

We follow the structure of the Chromium project, see [this StackExchange
question].

[this StackExchange question]: https://opensource.stackexchange.com/questions/4960/can-a-team-be-the-copyright-holder-mit

AUTHORS

@@ -0,0 +1,6 @@
+Elodie Thiéblin ([email protected]) for Logilab
+Fabien Amarger ([email protected]) for Siemens AG
+Igor Garmaev ([email protected]) for RWTH Aachen
+Marko Ristin ([email protected], [email protected], [email protected]) for Zurich University of Applied Sciences (ZHAW)
+Sebastian Heppner ([email protected]) for RWTH Aachen
+Tobias Langer ([email protected]) for Conplement AG

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2021 Marko Ristin, Nico Braunisch, Robert Lehmann
+Copyright (c) 2023 aas-core-codegen AUTHORS
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -19,3 +19,5 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
+
+Please see the file AUTHORS for the full list of the authors of aas-core3.0-codegen.