Implement an import option for sessions and speakers

[mariobehling]

Currently we have an export option for speakers and sessions. Please implement an option to import data from Pretalx and other open event systems.

• Change the "Export" button to a Import/Export dropdown.
• Provide a pop up asking "What do you want to import?" and the options
  • Speakers
  • Sessions
  • Speakers and Sessions
• Then provide an option to upload a CSV or spreadsheet
• Provide a screen showing the columns and an option to match the columns with columns in the eventyay system.

A sample file from a pretalx system attached.

export samples.xlsx

[Cyddharth-Gupta]

Hi, can this issue be assigned to me @mariobehling ?