Adds a responsive header with a mobile navigation menu to improve usability on small screens. This also includes adding a new event page, updating an existing event with a schedule, and refactoring the 'Donate' CTA by
inlining it on the homepage.
Migrated all images from the external host `img.tootaio.com` to be self-hosted within the project's `public` directory. This change improves performance, reliability, and
removes dependency on a third-party service. Additionally, the analytics script has been temporarily disabled.
