Database - Create reports table

[Sv443]

Table for reports of jokes, submissions and (TBD) submission edit proposals.

Fields:

• type: joke / submission / submissionEditProposal
• id: ID of the joke / submission / editProp. that was reported
• user: user ID of the reporter
• primaryReason: value from predefined reason enum
  • values: overlyOffensive, copyrightInfringement, wrongFlags, duplicate
• reasonMsg: custom reason message (~120-150 char limit)