Auto-generate markdown command docs (#4451)

* Finish updating

* a couple improvements

* Update renames

* cleanup examples

docs/commands/parse.md

@@ -1,26 +1,29 @@
-# parse
+---
+title: parse
+layout: command
+version: 0.59.0
+---
+
 Parse columns from string data using a simple pattern.
 
-## Usage
-```shell
-> parse <pattern> {flags} 
- ```
+## Signature
+
+```> parse (pattern) --regex```
 
 ## Parameters
-* `<pattern>` the pattern to match. Eg) "{foo}: {bar}"
 
-## Flags
-* -h, --help: Display this help message
-* -r, --regex: use full regex syntax for patterns
+ -  `pattern`: the pattern to match. Eg) "{foo}: {bar}"
+ -  `--regex`: use full regex syntax for patterns
 
 ## Examples
-  Parse a string into two named columns
+
+Parse a string into two named columns
 ```shell
 > echo "hi there" | parse "{foo} {bar}"
- ```
+```
 
-  Parse a string using regex pattern
+Parse a string using regex pattern
 ```shell
 > echo "hi there" | parse -r "(?P<foo>\w+) (?P<bar>\w+)"
- ```
+```