Auto-generate markdown command docs (#4451)

* Finish updating

* a couple improvements

* Update renames

* cleanup examples

docs/commands/zip.md

@@ -0,0 +1,23 @@
+---
+title: zip
+layout: command
+version: 0.59.0
+---
+
+Combine a stream with the input
+
+## Signature
+
+```> zip (other)```
+
+## Parameters
+
+ -  `other`: the other input
+
+## Examples
+
+Zip multiple streams and get one of the results
+```shell
+> 1..3 | zip 4..6
+```
+