update .gitignore to allow node package name

.gitignore

@@ -29,8 +29,6 @@ out
 vscode
 settings.json
 
-node
-node_modules
 package-lock.json
 package.json
 .vscode

spring-ai-core/src/main/java/org/springframework/ai/node/Node.java

@@ -0,0 +1,18 @@
+package org.springframework.ai.node;
+
+import java.util.Map;
+
+/**
+ * A simple data structure that contains content and metadata.
+ *
+ * @param <T> the type of content in the node
+ * @author Mark Pollack
+ * @since 1.0 M1
+ */
+public interface Node<T> {
+
+	T getContent();
+
+	Map<String, Object> getMetadata();
+
+}

spring-ai-core/src/main/java/org/springframework/ai/node/package-info.java

@@ -0,0 +1,4 @@
+/**
+ * This package contains base data types used across Spring AI.
+ */
+package org.springframework.ai.node;