Auto-generate markdown command docs (#4451)

* Finish updating

* a couple improvements

* Update renames

* cleanup examples

docs/commands/save.md

@@ -1,30 +1,17 @@
-# save
+---
+title: save
+layout: command
+version: 0.59.0
+---
 
-This command saves the contents of the pipeline to a file. Use this in combination with the `to json`, `to csv`, ... commands to save the contents in the specified format.
+Save a file.
 
-Syntax: `save (path) {flags}`
+## Signature
+
+```> save (filename) --raw```
 
 ## Parameters
 
-* `(path)` the path to save contents to
+ -  `filename`: the filename to use
+ -  `--raw`: open file as raw binary
 
-### Flags
-
-    --raw
-      treat values as-is rather than auto-converting based on file extension
-
-## Example
-
-You can save the name of files in a directory like this:
-
-```shell
-> ls | where type == File | select name | save filenames.csv
-```
-
-Or you can format it in supported formats using one of the `to` commands:
-
-```shell
-> ls | where type == File | select name | to csv | save filenames
-```
-
-`filename.csv` and `filenames` are both `csv` formatted files. Nu auto-converts the format if a supported file extension is given.