add README.md for library

instrumentation/jsonrpc4j-1.3/library/README.md

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+# Library Instrumentation for jsonrpc4j 1.3.3+
+
+Provides OpenTelemetry instrumentation for [jsonrpc4j](https://github.com/briandilley/jsonrpc4j) server.
+
+## Quickstart
+
+### Add the following dependencies to your project
+
+Replace `OPENTELEMETRY_VERSION` with the [latest release](https://search.maven.org/search?q=g:io.opentelemetry.instrumentation%20AND%20a:opentelemetry-jsonrpc4j-1.3).
+
+For Maven, add the following to your `pom.xml` dependencies:
+
+```xml
+<dependencies>
+  <dependency>
+    <groupId>io.opentelemetry.instrumentation</groupId>
+    <artifactId>opentelemetry-jsonrpc4j-1.3</artifactId>
+    <version>OPENTELEMETRY_VERSION</version>
+  </dependency>
+</dependencies>
+```
+
+For Gradle, add the following to your dependencies:
+
+```groovy
+implementation("io.opentelemetry.instrumentation:opentelemetry-jsonrpc4j-1.3:OPENTELEMETRY_VERSION")
+```
+
+### Usage
+
+The instrumentation library provides the implementation of `InvocationListener` to provide OpenTelemetry-based spans and context propagation.
+
+```java
+// For server-side, attatch the invocation listener to your service.
+JsonRpcBasicServer configureServer(OpenTelemetry openTelemetry, JsonRpcBasicServer server) {
+  JsonRpcTelemetry jsonrpcTelemetry = JsonRpcTelemetry.create(openTelemetry);
+  return server.setInvocationListener(jsonrpcTelemetry.newServerInvocationListener());
+}
+```