Auto-generate markdown command docs (#4451)

* Finish updating

* a couple improvements

* Update renames

* cleanup examples

docs/commands/dfr_sort.md

@@ -0,0 +1,29 @@
+---
+title: dfr sort
+layout: command
+version: 0.59.0
+---
+
+Creates new sorted dataframe or series
+
+## Signature
+
+```> dfr sort ...rest --reverse```
+
+## Parameters
+
+ -  `...rest`: column names to sort dataframe
+ -  `--reverse`: invert sort
+
+## Examples
+
+Create new sorted dataframe
+```shell
+> [[a b]; [3 4] [1 2]] | dfr to-df | dfr sort a
+```
+
+Create new sorted series
+```shell
+> [3 4 1 2] | dfr to-df | dfr sort
+```
+