Change hero CTA button text from "Start free" to "Start now"

Updates both hero and bottom CTA section buttons on the landing page
to use "Start now" instead of "Start free" for clearer call-to-action.

Author: claude

src/pages/index.tsx

@@ -60,7 +60,7 @@ function IndexPage() {
                 {/* Hero CTA Buttons */}
                 <div className={styles.heroCtaButtons}>
                   <a href={signInUrl} className={styles.ctaPrimary}>
-                    Start free
+                    Start now
                   </a>
                   <a href="/contact" className={styles.ctaSecondary}>
                     Talk to us
@@ -239,7 +239,7 @@ function IndexPage() {
                 </h2>
                 <div className={styles.ctaButtons}>
                   <a href={signInUrl} className={styles.ctaPrimary}>
-                    Start free
+                    Start now
                   </a>
                   <a href="/contact" className={styles.ctaSecondary}>
                     Talk to us