added isSkill condition authored by Lxlp's avatar Lxlp
## Description
Checks the X motion of the target entity against a range.
## Attributes
| Attribute | Aliases | Description | Default |
|-----------|-----------|----------------------------------------------------------------------|---------|
| velocity | v | The velocity to check for | |
## Examples
```yaml
Conditions:
- motionx{v=<1} true
```
## Aliases
- [x] motx
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