feat(json-api-context): expose meta builder as a property of the context

Author: jaredcnance

src/JsonApiDotNetCore/Services/IJsonApiContext.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using JsonApiDotNetCore.Builders;
 using JsonApiDotNetCore.Configuration;
 using JsonApiDotNetCore.Internal;
 using JsonApiDotNetCore.Internal.Query;
@@ -17,6 +18,6 @@ public interface IJsonApiContext
         List<string> IncludedRelationships { get; set; }
         bool IsRelationshipPath { get; }
         PageManager PageManager { get; set; }
-        
+        IMetaBuilder MetaBuilder { get; set; }
     }
 }

src/JsonApiDotNetCore/Services/JsonApiContext.cs

@@ -14,11 +14,13 @@ public class JsonApiContext : IJsonApiContext
         public JsonApiContext(
             IContextGraph contextGraph,
             IHttpContextAccessor httpContextAccessor,
-            JsonApiOptions options)
+            JsonApiOptions options,
+            IMetaBuilder metaBuilder)
         {
             ContextGraph = contextGraph;
             _httpContextAccessor = httpContextAccessor;
             Options = options;
+            MetaBuilder = metaBuilder;
         }
 
         public JsonApiOptions Options { get; set; }
@@ -30,6 +32,7 @@ public JsonApiContext(
         public bool IsRelationshipPath { get; private set; }
         public List<string> IncludedRelationships { get; set; }
         public PageManager PageManager { get; set; }
+        public IMetaBuilder MetaBuilder { get; set; }
 
         public IJsonApiContext ApplyContext<T>()
         {