docs: Prepare for new sub tree

See #11925

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

@@ -1,36 +0,0 @@
----
-title: path.Join
-description: Replaces path separators with slashes (`/`), joins the given path elements into a single path, and returns the shortest path name equivalent to the result.
-categories: []
-keywords: []
-action:
-  aliases: []
-  related:
-    - functions/path/Base
-    - functions/path/BaseName
-    - functions/path/Clean
-    - functions/path/Dir
-    - functions/path/Ext
-    - functions/path/Split
-    - functions/urls/JoinPath
-  returnType: string
-  signatures: [path.Join ELEMENT...]
-aliases: [/functions/path.join]
----
-
-See Go's [`path.Join`] and [`path.Clean`] documentation for details.
-
-[`path.Clean`]: https://pkg.go.dev/path#Clean
-[`path.Join`]: https://pkg.go.dev/path#Join
-
-
-```go-html-template
-{{ path.Join "partial" "news.html" }} → partial/news.html
-{{ path.Join "partial/" "news.html" }} → partial/news.html
-{{ path.Join "foo/bar" "baz" }} → foo/bar/baz
-{{ path.Join "foo" "bar" "baz" }} → foo/bar/baz
-{{ path.Join "foo" "" "baz" }} → foo/baz
-{{ path.Join "foo" "." "baz" }} → foo/baz
-{{ path.Join "foo" ".." "baz" }} → baz
-{{ path.Join "/.." "foo" ".." "baz" }} → baz
-```