Add license to files (#25)

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 - Restate Software, Inc., Restate GmbH
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+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

buf.yaml

@@ -0,0 +1,8 @@
+version: v1
+name: buf.build/restatedev/proto
+breaking:
+  use:
+    - FILE
+lint:
+  use:
+    - DEFAULT

dev/restate/ext.proto

@@ -1,8 +1,17 @@
-/*
-  This package provides user facing Restate extensions, which the user can include in their own contracts
- */
+// Copyright (c) 2023 - Restate Software, Inc., Restate GmbH
+//
+// This file is part of the Restate service protocol, which is
+// released under the MIT license.
+//
+// You can find a copy of the license in file LICENSE in the root
+// directory of this repository or package, or at
+// https://github.com/restatedev/proto/blob/main/LICENSE
+
 syntax = "proto3";
 
+// Restate extensions.
+// This package contains the definition of the protobuf extensions to define Restate services.
+// For more details, check out the documentation: https://docs.restate.dev/services/service_type
 package dev.restate.ext;
 
 import "google/protobuf/descriptor.proto";

dev/restate/services.proto

@@ -1,8 +1,17 @@
-/*
-  This package provides interfaces for built-in services
- */
+// Copyright (c) 2023 - Restate Software, Inc., Restate GmbH
+//
+// This file is part of the Restate service protocol, which is
+// released under the MIT license.
+//
+// You can find a copy of the license in file LICENSE in the root
+// directory of this repository or package, or at
+// https://github.com/restatedev/proto/blob/main/LICENSE
+
 syntax = "proto3";
 
+// Restate built-in services.
+// This package contains the definition of Restate built-in services.
+// To invoke them, check out the documentation: https://docs.restate.dev/services/invocation
 package dev.restate;
 
 import "google/protobuf/empty.proto";