Autogenerate missing docs (#3514)

* Autogenerate missing docs

* Update ansi.md

* Rename question mark command docs

* Delete empty?.md

docs/commands/path-join.md

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+# path join
+Join a structured path or a list of path parts.
+
+Optionally, append an additional path to the result. It is designed to accept
+the output of 'path parse' and 'path split' subcommands.
+
+## Usage
+```shell
+> path join ...args {flags} 
+ ```
+
+## Parameters
+* ...args: Optionally operate by column path
+
+## Flags
+* -h, --help: Display this help message
+* -a, --append <file path>: Path to append to the input
+
+## Examples
+  Append a filename to a path
+```shell
+> echo '/home/viking' | path join -a spam.txt
+ ```
+
+  Join a list of parts into a path
+```shell
+> echo [ '/' 'home' 'viking' 'spam.txt' ] | path join
+ ```
+
+  Join a structured path into a path
+```shell
+> echo [[ parent stem extension ]; [ '/home/viking' 'spam' 'txt' ]] | path join
+ ```
+