Add docs summary

Author: Nick-Stanton

xml/System.ComponentModel/HalfConverter.xml

@@ -31,7 +31,7 @@
       </AssemblyInfo>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
+        <summary>Initializes a new instance of the <see cref="T:System.ComponentModel.HalfConverter" /> class.</summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>

xml/System.ComponentModel/Int128Converter.xml

@@ -31,7 +31,7 @@
       </AssemblyInfo>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
+        <summary>Initializes a new instance of the <see cref="T:System.ComponentModel.Int128Converter" /> class.</summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>

xml/System.ComponentModel/UInt128Converter.xml

@@ -31,7 +31,7 @@
       </AssemblyInfo>
       <Parameters />
       <Docs>
-        <summary>To be added.</summary>
+        <summary>Initializes a new instance of the <see cref="T:System.ComponentModel.UInt128Converter" /> class.</summary>
         <remarks>To be added.</remarks>
       </Docs>
     </Member>