feat: Add hostname response filter

Resolves #87 (closed)

core/src/main/java/org/eclipsefoundation/core/namespace/ResponseHeaderNames.java

+/*********************************************************************
+* Copyright (c) 2023 Eclipse Foundation.
+*
+* This program and the accompanying materials are made
+* available under the terms of the Eclipse Public License 2.0
+* which is available at https://www.eclipse.org/legal/epl-2.0/
+*
+* Author: Zachary Sabourin <zachary.sabourin@eclipse-foundation.org>
+*
+* SPDX-License-Identifier: EPL-2.0
+**********************************************************************/
+package org.eclipsefoundation.core.namespace;
+
+public class ResponseHeaderNames {
+    public static final String X_NODE_NAME = "X-Node-Name";
+
+    private ResponseHeaderNames() {
+    }
+}