Adds a new page for chess analysis, powered by lichess.org,
and integrates it into the navigation menu. Also adds daily
puzzle snippet to home page. Updates hero image to correct gif.
Added a new hero button ("Kontakt") with a link to the contact page. Redesigned and enriched hero section text with a friendly message and call-to-action for recruiting new members. Incorporated conditional rendering for the button based on page content.
tfeigel