Add more formats for I/O.

[XAMPPRocky]

To add further formats a serde version needs to be available, that can handle the current format. If anyone has any other formats they'd like to see, I'll add them to the list.

• TOML(will be in the next version probably)
• XML(currently waiting on serde-xml to have serialization)

[ondrejsevcik]

CSV is nice when working with spreadsheets

[NickHackman]

For XML it seems that serde-xml-rs is a good substitute to the deprecated serde-xml only downside is that it doesn't seem too mature yet.