Added csv, tsv or markdown table to "pretty markdown table" Script

[xshoji]

I am apologize sudden pull request.
( If issue is required, I will create it. )

Can I add this feature?
This script execution image as follows.

# csv to markdown table
$ echo -e "a,bbb,c\nddd,e,fff"
a,bbb,c
ddd,e,fff
$ echo -e "a,bbb,c\nddd,e,fff" |node convertToMarkdownTable.js
| a   | bbb | c   |
| :-- | :-- | :-- |
| ddd | e   | fff |

# tsv to markdown table
$ echo -e "a\tbbb\tc\nddd\te\tfff"
a	bbb	c
ddd	e	fff
$ echo -e "a\tbbb\tc\nddd\te\tfff" |node convertToMarkdownTable.js
| a   | bbb | c   |
| :-- | :-- | :-- |
| ddd | e   | fff |

# markdown table to pretty markdown table
$ echo -e "|a|bbb|c|\n|:-|:-|:-|\n|ddd|e|fff|"
|a|bbb|c|
|:-|:-|:-|
|ddd|e|fff|
$ echo -e "|a|bbb|c|\n|:-|:-|:-|\n|ddd|e|fff|" |node convertToMarkdownTable.js
| a   | bbb | c   |
| :-- | :-- | :-- |
| ddd | e   | fff |

[sonarcloud]

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[IvanMathy]

This is great, thanks for the contribution!