added isSkill condition authored by Lxlp's avatar Lxlp
## Description
Checks if the target entity is the owner of the caster.
- If the caster is a tamable mob, if will check if the target entity is the mob's "vanilla" owner
- If the caster is not a tamable mob, then to match the target entity must have been set as the owner via the [SetOwner](/skills/mechanics/setowner) mechanic
## Attributes
> *This condition has no attributes*
## Examples:
```yaml
TargetConditions:
- owner true
```
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