refactor(home): move page content into per-language YAML sections

All visible text, lists, image refs, and CTAs for the home page now live
in en/index.md and es/index.md as a typed `sections:` frontmatter array.
HomePage.astro is reduced to a thin router; each section type is rendered
by a dedicated component in src/components/home/. Adds .no-balance utility
class to suppress text-wrap: balance on the commitments heading.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

www/src/components/home/HomeHero.astro

@@ -0,0 +1,16 @@
+---
+import type { HeroSection } from '../../types/home-sections';
+interface Props { section: HeroSection }
+const { section } = Astro.props;
+---
+<section class="home-hero">
+  <div class="container home-hero-grid">
+    <div>
+      <p class="script-label">{section.eyebrow}</p>
+      <h1 set:html={section.heading} />
+      <p>{section.body}</p>
+      <a class="button" href={section.cta.href}>{section.cta.label}</a>
+    </div>
+    <img src={`/assets/images/${section.image}`} alt={section.imageAlt} loading="eager" />
+  </div>
+</section>