Added toAsync as public.

Author: Scott Lewis

mcp-core/src/main/java/io/modelcontextprotocol/server/McpServerFeatures.java

@@ -101,7 +101,7 @@ public Async(McpSchema.Implementation serverInfo, McpSchema.ServerCapabilities s
 		 * @return a specification which is protected from blocking calls specified by the
 		 * user.
 		 */
-		static Async fromSync(Sync syncSpec, boolean immediateExecution) {
+		public static Async fromSync(Sync syncSpec, boolean immediateExecution) {
 			List<McpServerFeatures.AsyncToolSpecification> tools = new ArrayList<>();
 			for (var tool : syncSpec.tools()) {
 				tools.add(AsyncToolSpecification.fromSync(tool, immediateExecution));