Feature: Data export

[Koenari]

Was thinking about exporting data to other useful tools. Like

• [ ] etro.gg (for gear sets)
• [ ] GearPlanner spreadsheets by "The Balance" (for gear sets)
• [ ] Excel /Google Spreadsheet (for groups)
• [ ] An upcomming project of mine

I would like to get some feedback on how needed/wanted this would be to plan it