Auto-generate markdown command docs (#4451)

* Finish updating

* a couple improvements

* Update renames

* cleanup examples

docs/commands/grid.md

@@ -0,0 +1,18 @@
+---
+title: grid
+layout: command
+version: 0.59.0
+---
+
+Renders the output to a textual terminal grid.
+
+## Signature
+
+```> grid --width --color --separator```
+
+## Parameters
+
+ -  `--width {int}`: number of terminal columns wide (not output columns)
+ -  `--color`: draw output with color
+ -  `--separator {string}`: character to separate grid with
+