AI: Battle command simulation

[Albeoris]

We need a full-fledged emulation of combat commands for the design of improved AI.

For example: select the best target for a support ability without a knowledge of the script.

• [ ] Rewrite the command engine
• [ ] Calc a pure result but not affect a target
• [ ] Apply the result to the target
• [x] Integrate with support abilities
• [ ] Integrate with attack abilities
• [ ] Integrate with enemy abilities