OpenE2140: building construction animation (early prototype)

Very early prototype of the animation used for building construction from end of December 2022. Does not reflect current state. For more finished and polished version of the animation and the whole OpenE2140, watch preview videos: [OpenE2140: Preview 5 (September 2023) ](https://dalek.zone/w/gKjFswJPwu41fFrAX9TcRu) [OpenE2140: Preview 4 (May 2023)](https://dalek.zone/w/qJBKYThEApfiexosS1iNKM)