docs: Prepare for new sub tree

See #11925

docs/content/en/functions/path/BaseName.md

@@ -1,28 +0,0 @@
----
-title: path.BaseName
-description: Replaces path separators with slashes (`/`) and returns the last element of the given path, removing the extension if present.
-categories: []
-keywords: []
-action:
-  aliases: []
-  related:
-    - functions/path/Base
-    - functions/path/Clean
-    - functions/path/Dir
-    - functions/path/Ext
-    - functions/path/Join
-    - functions/path/Split
-  returnType: string
-  signatures: [path.BaseName PATH]
-aliases: [/functions/path.basename]
----
-
-{{< new-in 0.101.0 >}}
-
-```go-html-template
-{{ path.BaseName "a/news.html" }} → news
-{{ path.BaseName "news.html" }} → news
-{{ path.BaseName "a/b/c" }} → c
-{{ path.BaseName "/x/y/z/" }} → z
-{{ path.BaseName "" }} → .
-```