[Highly Customized] Allow merging AOE damage to buildings into one

[CrimRecya]

• Warheads are now able to damage building only once by merging the AOE damage when setting MergeBuildingDamage to true, which default to [CombatDamage]->MergeBuildingDamage.

In rulesmd.ini:

[CombatDamage]
MergeBuildingDamage=false    ; boolean

[SOMEWARHEAD]                ; Warhead
MergeBuildingDamage=         ; boolean

- This is different from `CellSpread.MaxAffect`.
- Due to the rounding of damage, there may be a slight increase in damage.

• Taking MO3 as an example:
  • before: total 268
    
  • after: total 285
    

[github-actions]

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• compiled-dll-182995ccb14427def106651956cb6479e2058d88.zip
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[MortonPL]

In what cases would you use it instead of high MaxAffect?

[Aephiex]

In what cases would you use it instead of high MaxAffect?

There are 2 possible cases:

1. A building bears a similar ability of the SC2 Immortal will fail to resist the damage if it was muliple instances;
2. A building with SC2 style armor that each instance of the damage is substracted by a number will count multiple times if the damage was multiple instances.

There is no apparent difference for this PR alone, as far as I see.

[CrimRecya]

In what cases would you use it instead of high MaxAffect?

As Aephiex said, this is not related to high MaxAffect.
Here are a few simple applicable examples:

• Display of damage
• Limit maximum/minimum single damage
• Evasion probability or blocking probability of damage