Change positionPercentage API of just created SplitPaneState.

[vdshb]

Describe the bug

I need to change positionPercentage of just created SplitPaneState.

Long story short, recreating SplitPaneState is not an option in my architecture. Use it in SplitPane just to calculate internal minPosition and maxPosition is a poor option as well.

Affected platforms

• Desktop

Reproducer

import org.jetbrains.compose.splitpane.SplitPaneState

fun main() {
    val splitPaneState = SplitPaneState(0.6f, true)
    splitPaneState.dispatchRawMovement(0.2f)
    println(splitPaneState.positionPercentage)  // prints "NaN"
}

Expected behavior
Some API supposed to be available to change/reset positionPercentage of already created but not yet used SplitPaneState.

Expected behavior
API are internal or buggy until put SplitPaneState into SplitPane.

[vdshb]

I've added #3974. It solves this issue.

[vdshb]

Fixed in #3974

[okushnikov]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.