added isSkill condition authored by Lxlp's avatar Lxlp
## Description
Sets the probability of the metaskill being executed.
## Attributes
| Attribute | Aliases | Description | Default |
|-----------|-----------|----------------------------------------------------------------------|---------|
| chance | c | The floating value which denotes the chance. It can range between 0 and 1, with 0 being a 0% chance and 1 being a 100% chance | 0.5 |
## Examples
In this example, the metaskill will be executed only 30% of the times it has been triggered, on average.
```yaml
Conditions:
- chance{chance=0.3} true
```
In this other example, the metaskill will be instead triggered 70% of the times it has been triggered
```yaml
Conditions:
- chance{chance=0.3} false
```
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