Add MDEDitorFeatures complex extension

Author: alexlipovka

input/fsh/structure-definition-fhir-emr-questionnaire.fsh

@@ -47,3 +47,4 @@ Description: "Profile of the Questionnaire resource that contains SDC extensions
 * item.extension contains DefaultSort named defaultSort 0..1
 * item.extension contains EnableSort named enableSort 0..1
 * item.extension contains EnableFiltering named enableFiltering 0..1
+* item.extension contains MDEditorFeatures named mdEditorFeatures 0..1

input/fsh/structure-definition-md-editor-feautures.fsh

@@ -0,0 +1,16 @@
+CodeSystem: MDEditorFeaturesCS
+Title: "Markdown Editor Features Code System"
+* #image "Image upload" "Enable image upload feature"
+
+ValueSet: MDEditorFeaturesVS
+Title: "Markdown Editor Features Value Set"
+* codes from system MDEditorFeaturesCS
+
+Extension: MDEditorFeatures
+Id: mdEditorFeatures
+Title: "Markdown Editor Features"
+Description: "Markdown editor features extension"
+* extension contains mdEditorFeature 0..*
+* extension[mdEditorFeature].value[x] only code
+* extension[mdEditorFeature].valueCode from MDEditorFeaturesVS (required)
+* extension[mdEditorFeature] ^short = "Markdown editor feature"