Auto-generate markdown command docs (#4451)

* Finish updating

* a couple improvements

* Update renames

* cleanup examples

docs/commands/math_ceil.md

@@ -0,0 +1,19 @@
+---
+title: math ceil
+layout: command
+version: 0.59.0
+---
+
+Applies the ceil function to a list of numbers
+
+## Signature
+
+```> math ceil ```
+
+## Examples
+
+Apply the ceil function to a list of numbers
+```shell
+> [1.5 2.3 -3.1] | math ceil
+```
+