Enable silent VNode creation to avoid Worker Manager deadlocks

Objective

Enable a "silent" VNode creation mode where the VDOM worker can create VNodes without calculating deltas or triggering autoMount/updateVdom events.

Problem

In the current Neo.worker.Manager implementation, onWorkerMessage unconditionally calls promiseForwardMessage if data.data exists. This pauses execution until resolveDomOperationPromise is called. However, resolveDomOperationPromise is typically triggered by automount or updateVdom event listeners. If neither autoMount nor updateVdom is true (as in the manual/silent VNode creation case), no event is fired, the promise is never resolved, and the message forwarding hangs indefinitely (deadlock).

Solution

Modify src/worker/Manager.mjs inside onWorkerMessage to conditionally use promiseForwardMessage. It should only be used if autoMount or updateVdom is true, indicating a DOM operation that needs to be waited on. Otherwise, the message should be forwarded immediately.

Implementation Details

if (!promise) {
    if (data.data) {
        if (data.data.autoMount || data.data.updateVdom) {
            data.data.autoMount  && me.fire('automount',  data);
            data.data.updateVdom && me.fire('updateVdom', data);

            // We want to delay the message until the rendering queue has processed it
            // See: https://github.com/neomjs/neo/issues/2864
            me.promiseForwardMessage(data).then(msgData => {
                me.sendMessage(msgData.destination, msgData)
            })
        } else {
            me.sendMessage(dest, data)
        }
    }
}

This logic has already been verified in src/worker/Manager.mjs. This ticket tracks the formal acceptance and documentation of this capability.