added isSkill condition authored by Lxlp's avatar Lxlp
## Description
Checks the stance of the target mob.
## Attributes
| Attribute | Aliases | Description | Default |
|-----------|-----------|----------------------------------------------------------------------|---------|
| stance | s | The stance to match | DEFAULT |
| strict | str | Whether to match exactly. Checks if the current stance contains this word if set to false | true |
## Examples
```yaml
Conditions:
- stance{s=CombatStance;str=true} true
```
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