fix: apply parameters to one shot events in emitters

[piiertho]

This resolves #406

[Copilot]

Pull request overview

This PR fixes a bug where parameters were not being applied to one-shot events. The issue was that apply_parameters() always operated on the member variable _event, but one-shot events use a separate local event instance that needs to have parameters applied to it.

Key Changes:

• Refactored apply_parameters() into two overloaded _apply_parameters() methods - one that accepts a Ref<FmodEvent> parameter and one parameterless version
• Updated _play() to pass the local event instance to _apply_parameters() so one-shot events receive their parameters correctly

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[Trodgy]

is there a way for me to compile the branch into a gdextension? the issue that this would fix is empeding progress for me right now and I'm not sure when this will actually be merged and given a new release

actually nvm I got confused the issue I'm having is caused by #403, mb