refactor: remove unused audience images and add Media Kit page route

- Deleted 8 audience images from public/images/audience/ directory (1.jpg through 8.jpg)
- Deleted 8 audience images from public/images/audiences/ directory (1.jpg through 8.jpg)
- Added lazy-loaded MediaPage route at /mediakit path in App.tsx
- Added Media Kit navigation link to Footer component with hover styling

public/images/mediakit/logo_dark/logomark.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="100" zoomAndPan="magnify" viewBox="0 0 75 74.999997" height="100" preserveAspectRatio="xMidYMid meet" version="1.0"><defs><clipPath id="17cc7c511f"><path d="M 0.679688 0.28125 L 48.441406 0.28125 L 48.441406 5 L 0.679688 5 Z M 0.679688 0.28125 " clip-rule="nonzero"/></clipPath><clipPath id="871aafab52"><path d="M 0.679688 36 L 48.441406 36 L 48.441406 40.601562 L 0.679688 40.601562 Z M 0.679688 36 " clip-rule="nonzero"/></clipPath><clipPath id="08bb39558f"><rect x="0" width="49" y="0" height="41"/></clipPath></defs><g transform="matrix(1, 0, 0, 1, 13, 17)"><g clip-path="url(#08bb39558f)"><g clip-path="url(#17cc7c511f)"><path stroke-linecap="butt" transform="matrix(0.559221, 0, 0, 0.559221, 3.099571, 0.434943)" fill="none" stroke-linejoin="miter" d="M -0.00342307 4.000082 L 76.539934 4.000082 " stroke="#22d3ee" stroke-width="8" stroke-opacity="1" stroke-miterlimit="4"/></g><path fill="#22d3ee" d="M 3.097656 18.003906 L 29.941406 18.003906 L 29.941406 22.480469 L 3.097656 22.480469 M 34.414062 18.003906 L 45.902344 18.003906 L 45.902344 22.480469 L 34.414062 22.480469 " fill-opacity="1" fill-rule="nonzero"/><g clip-path="url(#871aafab52)"><path stroke-linecap="butt" transform="matrix(0.559221, 0, 0, 0.559221, 3.099571, 36.091279)" fill="none" stroke-linejoin="miter" d="M -0.00342307 3.999929 L 76.539934 3.999929 " stroke="#22d3ee" stroke-width="8" stroke-opacity="1" stroke-miterlimit="4"/></g></g></g></svg>

public/images/mediakit/logo_light/logomark.svg

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+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="100" zoomAndPan="magnify" viewBox="0 0 75 74.999997" height="100" preserveAspectRatio="xMidYMid meet" version="1.0"><defs><clipPath id="17cc7c511f"><path d="M 0.679688 0.28125 L 48.441406 0.28125 L 48.441406 5 L 0.679688 5 Z M 0.679688 0.28125 " clip-rule="nonzero"/></clipPath><clipPath id="871aafab52"><path d="M 0.679688 36 L 48.441406 36 L 48.441406 40.601562 L 0.679688 40.601562 Z M 0.679688 36 " clip-rule="nonzero"/></clipPath><clipPath id="08bb39558f"><rect x="0" width="49" y="0" height="41"/></clipPath></defs><g transform="matrix(1, 0, 0, 1, 13, 17)"><g clip-path="url(#08bb39558f)"><g clip-path="url(#17cc7c511f)"><path stroke-linecap="butt" transform="matrix(0.559221, 0, 0, 0.559221, 3.099571, 0.434943)" fill="none" stroke-linejoin="miter" d="M -0.00342307 4.000082 L 76.539934 4.000082 " stroke="#22d3ee" stroke-width="8" stroke-opacity="1" stroke-miterlimit="4"/></g><path fill="#22d3ee" d="M 3.097656 18.003906 L 29.941406 18.003906 L 29.941406 22.480469 L 3.097656 22.480469 M 34.414062 18.003906 L 45.902344 18.003906 L 45.902344 22.480469 L 34.414062 22.480469 " fill-opacity="1" fill-rule="nonzero"/><g clip-path="url(#871aafab52)"><path stroke-linecap="butt" transform="matrix(0.559221, 0, 0, 0.559221, 3.099571, 36.091279)" fill="none" stroke-linejoin="miter" d="M -0.00342307 3.999929 L 76.539934 3.999929 " stroke="#22d3ee" stroke-width="8" stroke-opacity="1" stroke-miterlimit="4"/></g></g></g></svg>