Add package-info

Author: kabir

jsonrpc-common/src/main/java/io/a2a/jsonrpc/common/wrappers/package-info.java

@@ -0,0 +1,14 @@
+/**
+ * JSON-RPC 2.0 protocol message wrappers for the A2A Protocol.
+ * <p>
+ * This package contains internal implementation classes that wrap A2A Protocol domain objects
+ * in JSON-RPC 2.0 message structures. These classes are used by JSON-RPC transport implementations
+ * and are not part of the public SDK API.
+ * <p>
+ * <b>Internal Use Only:</b> Classes in this package are implementation details.
+ * The public API is in {@code io.a2a.spec}.
+ *
+ * @see io.a2a.spec
+ * @see <a href="https://www.jsonrpc.org/specification">JSON-RPC 2.0 Specification</a>
+ */
+package io.a2a.jsonrpc.common.wrappers;