Allow cascade to be a slice with a _target discriminator

Fixes #7782

docs/content/en/content-management/front-matter.md

@@ -159,6 +159,39 @@ show_comments: false
 
 Any node or section can pass down to descendents a set of Front Matter values as long as defined underneath the reserved `cascade` Front Matter key.
 
+### Target Specific Pages
+
+{{< new-in "0.76.0" >}}
+
+Since Hugo 0.76 the `cascade` block can be a slice with a optional `_target` keyword, allowing for multiple `cascade` values targeting different page sets.
+
+{{< code-toggle copy="false" >}}
+title ="Blog"
+[[cascade]]
+background = "yosemite.jpg"
+[cascade._target]
+path="/blog/**"
+lang="en"
+kind="page"
+[[cascade]]
+background = "goldenbridge.jpg"
+[cascade._target]
+kind="section"
+{{</ code-toggle >}}
+
+Keywords available for `_target`:
+
+path
+: A [Glob](https://github.com/gobwas/glob) pattern matching the content path below /content. Expects Unix-styled slashes. Note that this is the virtual path, so it starts at the mount root.
+
+kind
+: A Glob pattern matching the Page's Kind(s), e.g. "{home,section}".
+
+lang
+: A Glob pattern matching the Page's language, e.g. "{en,sv}".
+
+Any of the above can be omitted. 
+
 ### Example
 
 In `content/blog/_index.md`
@@ -174,6 +207,8 @@ With the above example the Blog section page and its descendents will return `im
 - Said descendent has its own `banner` value set 
 - Or a closer ancestor node has its own `cascade.banner` value set.
 
+
+
 ## Order Content Through Front Matter
 
 You can assign content-specific `weight` in the front matter of your content. These values are especially useful for [ordering][ordering] in list views. You can use `weight` for ordering of content and the convention of [`<TAXONOMY>_weight`][taxweight] for ordering content within a taxonomy. See [Ordering and Grouping Hugo Lists][lists] to see how `weight` can be used to organize your content in list views.