QQmlJSImportVisitor: bindings on QQmlJSScopes are created when scopes are not yet fully resolved

Current QQmlJSImportVisitor model assumes that we could create bindings as soon as we encounter them. In practice, this is problematic as the scope that the binding belongs to may not be resolved, yet. For instance,

import QtQuick
Item {
    property IC p
    p.onXChanged: { // here, we haven't seen `IC` yet
        console.log("hooray");
    }
    component IC : Text {
        property string x
    }
}