docs: document InstrumentationLibrary interface

Author: mwear

packages/opentelemetry-core/src/common/types.ts

@@ -43,6 +43,11 @@ export interface ShimWrapped {
   __original: Function;
 }
 
+/**
+ * An instrumentation library consists of the name and version used to
+ * obtain a tracer or meter from a provider. This metadata is made available
+ * on ReadableSpan and MetricRecord for use by the export pipeline.
+ */
 export interface InstrumentationLibrary {
   readonly name: string;
   readonly version: string;