Autogenerate missing docs (#3514)

* Autogenerate missing docs

* Update ansi.md

* Rename question mark command docs

* Delete empty?.md

docs/commands/path-exists.md

@@ -0,0 +1,20 @@
+# path exists
+Check whether a path exists
+
+## Usage
+```shell
+> path exists ...args {flags} 
+ ```
+
+## Parameters
+* ...args: Optionally operate by column path
+
+## Flags
+* -h, --help: Display this help message
+
+## Examples
+  Check if a file exists
+```shell
+> echo '/home/joe/todo.txt' | path exists
+ ```
+