Auto-generate markdown command docs (#4451)

* Finish updating

* a couple improvements

* Update renames

* cleanup examples

docs/commands/transpose.md

@@ -0,0 +1,18 @@
+---
+title: transpose
+layout: command
+version: 0.59.0
+---
+
+Transposes the table contents so rows become columns and columns become rows.
+
+## Signature
+
+```> transpose ...rest --header-row --ignore-titles```
+
+## Parameters
+
+ -  `...rest`: the names to give columns once transposed
+ -  `--header-row`: treat the first row as column names
+ -  `--ignore-titles`: don't transpose the column names into values
+