add Apache 2.0 license header

README.md

@@ -674,4 +674,16 @@ const transactionIntentHash = result.value.transactionIntentHash
 
 # License
 
-The Wallet SDK code is released under [Apache 2.0 license](LICENSE). Binaries are licensed under the [Radix Software EULA](http://www.radixdlt.com/terms/genericEULA)
+The Wallet SDK binaries are licensed under the [Radix Software EULA](http://www.radixdlt.com/terms/genericEULA). 
+
+The Wallet SDK code is released under [Apache 2.0 license](LICENSE). 
+
+      Copyright 2023 Radix Publishing Ltd
+
+      Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License.
+
+      You may obtain a copy of the License at: http://www.apache.org/licenses/LICENSE-2.0
+
+      Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+
+      See the License for the specific language governing permissions and limitations under the License.