Provide examples for the wikify widget (#8792)

* Provide examples for the wikify widget

* fix a typo in the wikify widget doc tiddler

* Update and rename TestCases_WikifyWidget_WidgetInput_Fail.tid to TestCases_WikifyWidget_WidgetValue_Fail.tid

* Update and rename TestCases_WikifyWidget_WidgetInput_Success.tid to TestCases_WikifyWidget_WidgetValue_Success.tid

* Update WikifyWidget.tid

* Update TestCases_WikifyWidget_WidgetValue_Fail.tid

* Update TestCases_WikifyWidget_WidgetValue_Success.tid

* Update WikifyWidget.tid

* Update TestCases_WikifyWidget_WidgetValue_Success.tid

fix small error causing validation to fail

* Update TestCases_WikifyWidget_WidgetValue_Success.tid

* remove trailing end line

* remove trailing new line

* add description, remove modified field

editions/tw5.com/tiddlers/TestCases_WikifyWidget_WidgetValue_Fail.tid

@@ -0,0 +1,33 @@
+created: 20241202000005087
+description: Using a widget as a value
+tags: $:/tags/wiki-test-spec-failing
+title: TestCases/WikifyWidget/WidgetValue/Fail
+type: text/vnd.tiddlywiki-multiple
+
+title: Narrative
+
+If you try to directly use a widget as a value, you will instead get the raw wikitext of the widget and not the rendered value.
++
+title: Output
+
+<span style.color={{widget}} style.background={{target}}>
+    {{widget}} text on {{target}} is a good contrast
+</span>
++
+title: widget
+text: <$transclude $variable="contrastcolour" target={{target}} fallbackTarget=<<fallbackTarget>> colourA={{colourA}} colourB={{colourB}} />
++
+title: target
+text: purple
++
+title: colourA
+text: white
++
+title: colourB
+text: black
++
+title: ExpectedResult
+
+<p><span style="color:white<$transclude $variable="contrastcolour" target={{target}} fallbackTarget=<<fallbackTarget>> colourA={{colourA}} colourB={{colourB}} />;background:purple;">
+    white text on purple is a good contrast
+</span></p>