Auto-generate markdown command docs (#4451)

* Finish updating

* a couple improvements

* Update renames

* cleanup examples

docs/commands/drop.md

@@ -1,28 +1,33 @@
-# drop
+---
+title: drop
+layout: command
+version: 0.59.0
+---
+
 Remove the last number of rows or columns.
 
-## Usage
-```shell
-> drop (rows) <subcommand> {flags} 
- ```
+## Signature
 
-## Subcommands
-* drop column - Remove the last number of columns. If you want to remove columns by name, try 'reject'.
+```> drop (rows)```
 
 ## Parameters
-* `(rows)` starting from the back, the number of rows to remove
 
-## Flags
-* -h, --help: Display this help message
+ -  `rows`: starting from the back, the number of rows to remove
 
 ## Examples
-  Remove the last item of a list/table
-```shell
-> echo [1 2 3] | drop
- ```
 
-  Remove the last 2 items of a list/table
+Remove the last item of a list/table
 ```shell
-> echo [1 2 3] | drop 2
- ```
+> [0,1,2,3] | drop
+```
+
+Remove zero item of a list/table
+```shell
+> [0,1,2,3] | drop 0
+```
+
+Remove the last two items of a list/table
+```shell
+> [0,1,2,3] | drop 2
+```