Double Trouble: more flexible categorization & load order control

[megascatterbomb]

Changes:

• Multiple categories can be set per special round. Any matching category renders two special rounds incompatible (unless forced with /ware_nextspecial). categories = null prevents it from being used in Double Trouble at all, categories = [] allows it to run alongside anything.
  • Updated the categories for existing special rounds to prevent some conflicts.
• Adds priority property to each special round. Lower priority values are always loaded first. Defaults to 0.
• Double Trouble calls OnMultipleSpecialRounds(file_names, data) on each special round so custom interactions between special rounds can be implemented.
  • For example, slow_mo and boss_rush are both affected by extended_round.
• Add shortcuts for loading a specific number of special rounds e.g. /ware_nextspecial any2 loads 2 specials.