feat!: Adds closure support to Field definitions

Also removes codability of GraphQL types that now use closures, and removes TypeReference usage. Instead, use circular typing in Swift and Javascript approach where fields/interfaces are stored as closures and resolved realtime.

Author: NeedleInAJayStack

Sources/GraphQL/Execution/Execute.swift

@@ -1237,7 +1237,7 @@ func getFieldDef(
     }
 
     // This field should exist because we passed validation before execution
-    guard let fieldDefinition = parentType.fields[fieldName] else {
+    guard let fieldDefinition = try parentType.getFields()[fieldName] else {
         throw GraphQLError(
             message: "Expected field definition not found: '\(fieldName)' on '\(parentType.name)'"
         )

Sources/GraphQL/Execution/Values.swift

@@ -157,7 +157,7 @@ func coerceValue(value: Map, type: GraphQLInputType) throws -> Map {
             throw GraphQLError(message: "Must be dictionary to extract to an input type")
         }
 
-        let fields = objectType.fields
+        let fields = try objectType.getFields()
 
         var object = OrderedDictionary<String, Map>()
         for (fieldName, field) in fields {

Sources/GraphQL/Language/Parser.swift

@@ -1112,7 +1112,8 @@ func parseScalarExtensionDefinition(lexer: Lexer) throws -> ScalarExtensionDefin
         definition: ScalarTypeDefinition(
             name: name,
             directives: directives
-        )
+        ),
+        directives: directives
     )
 }