refactor: move GraphQLExtendedScalarsInitializer to separate subfolder

it is not Web Servlet implementation specific

Author: BlasiusSecundus

graphql-spring-boot-autoconfigure/src/main/java/graphql/kickstart/autoconfigure/web/servlet/GraphQLExtendedScalarsInitializer.java renamed to graphql-spring-boot-autoconfigure/src/main/java/graphql/kickstart/autoconfigure/scalars/GraphQLExtendedScalarsInitializer.java

@@ -1,4 +1,4 @@
-package graphql.kickstart.autoconfigure.web.servlet;
+package graphql.kickstart.autoconfigure.scalars;
 
 import graphql.scalars.ExtendedScalars;
 import graphql.schema.GraphQLScalarType;

graphql-spring-boot-autoconfigure/src/main/resources/META-INF/spring.factories

@@ -1,5 +1,5 @@
 org.springframework.context.ApplicationContextInitializer=\
-    graphql.kickstart.autoconfigure.web.servlet.GraphQLExtendedScalarsInitializer
+    graphql.kickstart.autoconfigure.scalars.GraphQLExtendedScalarsInitializer
 org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
     graphql.kickstart.autoconfigure.web.servlet.GraphQLWebAutoConfiguration,\
     graphql.kickstart.autoconfigure.web.servlet.GraphQLWebSecurityAutoConfiguration,\

graphql-spring-boot-autoconfigure/src/test/java/graphql/kickstart/autoconfigure/web/servlet/test/extendedscalars/ExtendedScalarsTest.java

@@ -3,7 +3,7 @@
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 
-import graphql.kickstart.autoconfigure.web.servlet.GraphQLExtendedScalarsInitializer;
+import graphql.kickstart.autoconfigure.scalars.GraphQLExtendedScalarsInitializer;
 import graphql.scalars.ExtendedScalars;
 import graphql.schema.GraphQLScalarType;
 import java.util.AbstractMap;