Using Editor.XYZ breaks the default template

The default URP template/starter project has a class (ReadmeEditor.cs)
which inherits from the type "Editor." If we use Editor.XYZ as the
namespace, that class errors out stating it isn't sure if "Editor"
is a type or a namespace (probably since Editor is now a valid namespace)

com.unity.perception/Editor/Randomization/PropertyDrawers/AssetSourceDrawer.cs

-using Editor.Randomization.VisualElements.AssetSource;
+using UnityEditor.Perception.Randomization.VisualElements.AssetSource;
 using UnityEngine;
 using UnityEngine.Perception.Randomization;
 using UnityEngine.UIElements;

com.unity.perception/Editor/Randomization/VisualElements/AssetSource/AssetListElement.cs

 using System;
 using System.Collections;
-using UnityEditor;
-using UnityEditor.Perception.Randomization;
-namespace Editor.Randomization.VisualElements.AssetSource
+namespace UnityEditor.Perception.Randomization.VisualElements.AssetSource
 {
     class AssetListElement : VisualElement
     {

com.unity.perception/Editor/Randomization/VisualElements/AssetSource/AssetListItemElement.cs

 using UnityEditor.UIElements;
 using UnityEngine.UIElements;
 
-namespace Editor.Randomization.VisualElements.AssetSource
+namespace UnityEditor.Perception.Randomization.VisualElements.AssetSource
 {
     class AssetListItemElement : VisualElement
     {

com.unity.perception/Editor/Randomization/VisualElements/AssetSource/AssetSourceElement.cs

 using UnityEngine.Perception.Randomization;
 using UnityEngine.UIElements;
 
-namespace Editor.Randomization.VisualElements.AssetSource
+namespace UnityEditor.Perception.Randomization.VisualElements.AssetSource
 {
     class AssetSourceElement : VisualElement
     {