added splash screens to both pages, corrected adaptability. updated the list of distributions to download

the downloads page has been added, the menu in the header has been removed, the carousel has been removed, the adaptability of the site has been improved

upd: in the mobile version, slide strips have been removed from the carousel, a project support button has been added, minor changes in the text editing

updated the logo in the footer, work on adaptability: removed the carousel arrows, work on the adaptability of the pop-up window