feat: added NOTICE for changes

NOTICE.md

@@ -0,0 +1,14 @@
+## Changes from source project
+
+Part of this project uses a modified version of the public api extension and http extension of the edc-connector from: https://github.com/eclipse-edc/Connector
+
+The following files were modified from their original source:
+- http-pull-connector/src/main/java/org/eclipse/org/eclipse/edc/connector/dataplane/api/controller/ContainerRequestContextApiImpl.java
+- http-pull-connector/src/main/java/org/eclipse/org/eclipse/edc/connector/dataplane/api/controller/DataFlowRequestSupplier.java
+- http-pull-connector/src/main/java/org/eclipse/edc/connector/dataplane/api/controller/ExtendedDataPlanePublicApiController.java
+- http-pull-connector/src/main/java/org/eclipse/edc/connector/dataplane/api/pipeline/ApiDataSink.java
+- http-pull-connector/src/main/java/org/eclipse/edc/connector/dataplane/api/pipeline/ApiDataSinkFactory.java
+- http-pull-connector/src/main/java/org/eclipse/edc/connector/dataplane/api/DataPlanePublicApiExtension.java
+- http-pull-connector/src/main/java/org/eclipse/edc/connector/dataplane/http/pipeline/datasink/HttpDataSink.java
+- http-pull-connector/src/main/java/org/eclipse/edc/connector/dataplane/http/pipeline/datasource/HttpDataSource.java
+- http-pull-connector/src/main/java/org/eclipse/edc/connector/dataplane/http/DataPlaneHttpExtension.java