Custom trailer animation for units

[Crazybird2]

First check

• The suggestion is NOT related to functionality of Ares, HAres, Kratos or any other YR engine extension.
• The suggested feature / enhancement is NOT implemented in Ares/Phobos yet and the existing possibilites are not viable or good enough to achieve the wanted result.
• I agree to elaborate the details if requested and provide thorough testing if the feature is implemented.
• I added a very descriptive title to this issue.
• I used the GitHub search and read the issue list to find a similar issue and didn't find it.
• I thought out how the feature / enhancement should work and described it in the most detailed and clear way.

Description

I want to suggest custom trailer animation that only play when the unit is moving and no longer display when the unit stop. Can be useful for making dust effect when a unit is moving

INI code

[SomeUnitArtEntry]
Custom.trailer=
CustomTrailerVisibleWhenMoving=yes/no

Additional context

No response