Postgresql migration

[mrjvs]

• Create initial schema
• implement schemas as models - 27th October 2021
  • guilds
  • guild_settings_management
  • guild_settings_moderation
  • guild_settings_core
  • guild_modules
  • guild_autoroles
  • guild_greetings
  • guild_tags
  • guild_modlog_events
  • guild_modlog_events_enabled
  • guild_todolist
  • guild_todolist_items
  • guild_filters
  • guild_filters_criteria
  • guild_perms_groups
  • guild_perms_users
  • guild_perms_user_membership
• implement hibernate - 27th October 2021
• Migrate bot code
• migrate current database