Option to auto-add header fill row when doing <leader>tt of selection of existing .csv content

Right now if I visually select the following .csv content
```
header1,header2,header3
value 1,value2,value3

```
and then do `tt `
it results in
```
| header1 | header2 | header3 |
| value 1 | value2 | value3 |

```
so I have to manually do `||` after inserting a line after the first line.
Instead, I would like a config option to be able to convert the existing content to the following for markdown:
```
| header1 | header2 | header3 |
|---------|---------|---------|
| value 1 | value2 | value3 |
```

Is there currently an option to do that?
If not, what would be a good name for that option if I wanted to submit a PR?