feat: added extra information to FilterQuery

Author: Harro van der Kroft

src/JsonApiDotNetCore/Internal/Query/FilterQuery.cs

@@ -4,8 +4,19 @@
 
 namespace JsonApiDotNetCore.Internal.Query
 {
+    /// <summary>
+    /// Allows you to filter the query, via the methods shown at
+    /// <see href="https://json-api-dotnet.github.io/#/filtering">HERE</see>
+    /// </summary>
     public class FilterQuery : BaseQuery
     {
+        /// <summary>
+        /// Allows you to filter the query, via the methods shown at
+        /// <see href="https://json-api-dotnet.github.io/#/filtering">HERE</see>
+        /// </summary>
+        /// <param name="attribute">the json attribute you want to filter on</param>
+        /// <param name="value">the value this attribute should be</param>
+        /// <param name="operation">possible values: eq, ne, lt, gt, le, ge, like, in (default)</param>
         public FilterQuery(string attribute, string value, string operation)
             : base(attribute)
         {