Support MythicMobs mobs in OneBlock phases

[SEDIIK]

Is your feature request related to a problem?

Hello BentoBox team!
I would like to suggest adding support for MythicMobs mobs in OneBlock phases.

Currently, OneBlock phases allow spawning only vanilla mobs. It would be very useful to have the ability to define MythicMobs mobs as part of a phase, for example:

• Bosses for specific phases
• More diverse and unique progression on OneBlock servers

Describe the solution you'd like.

Possible implementation ideas:

• Allow MythicMobs mob IDs in phase mob spawn lists
• Optional integration that checks if MythicMobs is installed
• Phase configuration example:

mobs:
   - mythicmobs:SkeletonKing
   - mythicmobs:FireDemon

Describe alternatives you've considered.

1. Spawning MythicMobs via commands executed on phase change or block break events.
   This works as a workaround, but it is unreliable, harder to maintain, and not integrated
   into OneBlock’s native phase system (spawn chances, limits, balancing).

2. Creating separate arenas or events outside of OneBlock phases for MythicMobs content.
   This breaks the core OneBlock progression concept and feels disconnected from the phase system.

Agreements

• I have searched for and ensured there isn't already an open issue regarding this.
• I have ensured the feature I'm requesting isn't already in the latest supported BentoBox build or Addons.

Other

This feature would greatly improve customization and allow server owners to create much more unique OneBlock experiences.

[BONNe]

https://docs.bentobox.world/en/latest/gamemodes/AOneBlock/#phase-config-files

      - type: mob
        mob: <mob_type>

Not sure if it works with mystic mobs, but API technically supports it