feat(brand): official logo, forest green/gold theme, and favicon set

Wire public/logo.png into nav/footer LogoMark with responsive sizing,
remap primary/secondary Tailwind scales to brand colors, and refresh
CTAs, PWA manifest, and favicon assets for mim4u.org.

Co-authored-by: Cursor <[email protected]>

package.json

@@ -38,6 +38,7 @@
   "homepage": "https://miraclesinmotion.org",
   "dependencies": {
     "@fontsource/inter": "^5.2.8",
+    "@fontsource/playfair-display": "^5.2.8",
     "@react-three/fiber": "^8.16.8",
     "@stripe/react-stripe-js": "^2.8.1",
     "@stripe/stripe-js": "^4.7.0",