Auto-generate markdown command docs (#4451)

* Finish updating

* a couple improvements

* Update renames

* cleanup examples

docs/commands/date_to-timezone.md

@@ -0,0 +1,38 @@
+---
+title: date to-timezone
+layout: command
+version: 0.59.0
+---
+
+Convert a date to a given time zone.
+
+## Signature
+
+```> date to-timezone (time zone)```
+
+## Parameters
+
+ -  `time zone`: time zone description
+
+## Examples
+
+Get the current date in UTC+05:00
+```shell
+> date now | date to-timezone +0500
+```
+
+Get the current local date
+```shell
+> date now | date to-timezone local
+```
+
+Get the current date in Hawaii
+```shell
+> date now | date to-timezone US/Hawaii
+```
+
+Get the current date in Hawaii
+```shell
+> "2020-10-10 10:00:00 +02:00" | date to-timezone "+0500"
+```
+