WEEEEELLLLLL: GOOD NEWS !!! A colleague of mine (https://gamejolt.com/@LightDeveloperRU) helped me a lot with the timeline implementation. So I can already say 75% that the first alpha test of the editor will take place in December of this year :)
Unfortunately, the timeline will not work correctly in the first versions of the editor. I don't understand how to make a timeline so that it fits in time