Auto-generate markdown command docs (#4451)

* Finish updating

* a couple improvements

* Update renames

* cleanup examples

docs/commands/into_bool.md

@@ -0,0 +1,43 @@
+---
+title: into bool
+layout: command
+version: 0.59.0
+---
+
+Convert value to boolean
+
+## Signature
+
+```> into bool ...rest```
+
+## Parameters
+
+ -  `...rest`: column paths to convert to boolean (for table input)
+
+## Examples
+
+Convert value to boolean in table
+```shell
+> echo [[value]; ['false'] ['1'] [0] [1.0] [$true]] | into bool value
+```
+
+Convert bool to boolean
+```shell
+> $true | into bool
+```
+
+convert decimal to boolean
+```shell
+> 1 | into bool
+```
+
+convert decimal string to boolean
+```shell
+> '0.0' | into bool
+```
+
+convert string to boolean
+```shell
+> 'true' | into bool
+```
+