[opentracing-shim] Add missing XML comments (#5512)

Co-authored-by: Utkarsh Umesan Pillai <66651184+utpilla@users.noreply.github.com>

src/OpenTelemetry.Shims.OpenTracing/OpenTelemetry.Shims.OpenTracing.csproj

@@ -3,11 +3,6 @@
     <TargetFrameworks>$(TargetFrameworksForLibraries)</TargetFrameworks>
     <Description>OpenTracing shim for OpenTelemetry .NET</Description>
     <PackageTags>$(PackageTags);distributed-tracing;OpenTracing</PackageTags>
-    <IsPackable>true</IsPackable>
-    <!--
-    TODO: Disable this exception, and actually do document all public API.
-    -->
-    <NoWarn>$(NoWarn),1591</NoWarn>
 
     <!-- this is temporary. will remove in future PR. -->
     <Nullable>disable</Nullable>

src/OpenTelemetry.Shims.OpenTracing/TracerShim.cs

@@ -7,16 +7,29 @@
 
 namespace OpenTelemetry.Shims.OpenTracing;
 
+/// <summary>
+/// Implements OpenTracing <see cref="global::OpenTracing.ITracer"/> interface
+/// using OpenTelemetry <see cref="Trace.Tracer"/> implementation.
+/// </summary>
 public class TracerShim : global::OpenTracing.ITracer
 {
     private readonly Trace.Tracer tracer;
     private readonly TextMapPropagator definedPropagator;
 
+    /// <summary>
+    /// Initializes a new instance of the <see cref="TracerShim"/> class.
+    /// </summary>
+    /// <param name="tracerProvider"><see cref="Trace.TracerProvider"/>.</param>
     public TracerShim(Trace.TracerProvider tracerProvider)
         : this(tracerProvider, null)
     {
     }
 
+    /// <summary>
+    /// Initializes a new instance of the <see cref="TracerShim"/> class.
+    /// </summary>
+    /// <param name="tracerProvider"><see cref="Trace.TracerProvider"/>.</param>
+    /// <param name="textFormat"><see cref="TextMapPropagator"/>.</param>
     public TracerShim(Trace.TracerProvider tracerProvider, TextMapPropagator textFormat)
     {
         Guard.ThrowIfNull(tracerProvider);