Add a test for code annotation and incremental in revealjs

tests/docs/smoke-all/2024/10/23/7142.qmd

@@ -0,0 +1,32 @@
+---
+title: Code annotaton and incremental
+format: 
+  revealjs: 
+    incremental: true
+    code-annotations: hover
+_quarto:
+  tests:
+    revealjs:
+      ensureHtmlElements:
+        - []
+        - ['.fragment']
+      ensureFileRegexMatches:
+        - [] 
+        - []
+---
+
+## First slide
+
+## Slides with annotations
+
+``` python
+1 + 1 # <1>
+x = 2 # <2>
+x + 3 # <3>
+```
+
+1.  Note 1
+2.  Note 2
+3.  Note 3
+
+## Last slide