fix: a11y (gold-deep token AA, Disciplinas ul/li, Cierre nav) + scaffold cleanup

- Add gold-deep #7A5F15 token (~5.97:1 on white, WCAG AA) for small-text eyebrows
- Apply text-gold-deep to 4 eyebrows (Hero, Disciplinas, ComoEmpezar, Estratega)
- Disciplinas: div grid → semantic ul/li for screen-reader consistency
- Cierre: wrap contact links in <nav aria-label="Contacto">
- Estratega: portrait gradient → Tailwind tokens (from-ink to-gold), drop inline hex
- Delete unused Geist fonts (app/fonts/, ~134KB)
- Replace default README with creeer README
- Tests: +2 structural (Disciplinas ul/li, Cierre nav aria-label)

components/sections/Hero.tsx

@@ -22,7 +22,7 @@ export function Hero({ variant = 'editorial' }: { variant?: Variant }) {
       <Container className="min-h-[88vh] flex flex-col items-center justify-center text-center py-24">
         <motion.div variants={staggerContainer} initial="hidden" animate="visible" {...motionProps(reduced)} className="flex flex-col items-center">
           <motion.div variants={fadeInUp}><Wordmark size="xl" /></motion.div>
-          <motion.p variants={fadeInUp} className="mt-6 text-xs md:text-sm tracking-[0.3em] uppercase font-semibold text-gold">
+          <motion.p variants={fadeInUp} className="mt-6 text-xs md:text-sm tracking-[0.3em] uppercase font-semibold text-gold-deep">
             {hero.eyebrow}
           </motion.p>
           <motion.h1 variants={fadeInUp} className={`mt-8 ${headlineBase} ${headlineSize} text-ink`}>