Autogenerate missing docs (#3514)

* Autogenerate missing docs

* Update ansi.md

* Rename question mark command docs

* Delete empty?.md

docs/commands/url-scheme.md

@@ -0,0 +1,25 @@
+# url scheme
+gets the scheme (eg http, file) of a url
+
+## Usage
+```shell
+> url scheme ...args {flags} 
+ ```
+
+## Parameters
+* ...args: optionally operate by path
+
+## Flags
+* -h, --help: Display this help message
+
+## Examples
+  Get scheme of a url
+```shell
+> echo 'http://www.example.com' | url scheme
+ ```
+
+  You get an empty string if there is no scheme
+```shell
+> echo 'test' | url scheme
+ ```
+