add images

docs/utils/editors/editorjs.md

@@ -4,6 +4,8 @@ Workspace in classic editors is made of a single contenteditable element, used t
 
 Editor.js is fully integrated in Murph as form types.
 
+![](/_static/img/editors/editorjs.png)
+
 ## Classic form
 
 ```

docs/utils/editors/grapesjs.md

@@ -4,6 +4,8 @@ GrapesJS is a web builder which combines different tools and features with the g
 
 GrapesJS is fully integrated in Murph as form types.
 
+![](/_static/img/editors/grapesjs.png)
+
 ## Classic form
 
 ```

docs/utils/editors/tinymce.md

@@ -2,6 +2,8 @@
 
 TinyMCE gives you total control over your rich text editing. It's fully integrated in Murph as form types.
 
+![](/_static/img/editors/tinymce.png)
+
 ## Classic form
 
 ```