fix IllegalArgumentException when re-show a disposed ComposeWindow

[XYZboom]

Proposed Changes

• Move the setUndecoratedSafely extension function to become a member function of ComposeWindow and ComposeDialog.
• Add document on dispose for ComposeWindow and ComposeDialog.
• While it is still not possible to reshow a compose window that has already been disposed, it is now possible to set the window decorate state at runtime(see document on dispose).

Testing

Test: Added new unit tests.

Issues Fixed

Fixes: JetBrains/compose-multiplatform#4579

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[XYZboom]

Re-show a disposed compose window looks impossible right now, maybe here some other way to re-show a disposed window

[XYZboom]

Now disposed window is not able to re-show but we can change decorated state of window at runtime.
The code below works

fun main() = application {
    var undecorated by remember { mutableStateOf(false) }
    Window(onCloseRequest = {}, undecorated = undecorated) {
        Button(onClick = { undecorated = !undecorated }) {
            Text("Toggle Decorated")
        }
    }
}

Because recreating a window that has already been disposed is generally used to set the window decoration state at runtime, although it is still not possible to reshow a disposed window now, we can call setUndecoratedSafely to set the window decoration state safely at runtime.