Add a new landing view and stylesheet for MirrorGame. Creates web/templates/view/index.html (hero layout with image, play button, and left/right ad banner iframes) and web/assets/css/index.css (CSS variables, Inter font import, hero layout, responsive breakpoints, and .hero-play-button styles). Provides responsive behavior and positioning for ads and hero components.
Add a small utility function in web/assets/js/index.js that increments an element's CSS rotation by 45 degrees. The function reads the element's inline transform (handling an empty value), parses the current rotation angle modulo 360, and sets the new rotate(angle+45) value.
