feat: add team, roadmap and contact sections, wire up index page

Co-founders (Baptiste Moulin / Quentin / Radu Mihail) with a complementarity
matrix, a three-phase timeline (pilot → mesh → network) and a contact block
with mailto CTAs. Index page composes the full scroll narrative.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/pages/index.astro

@@ -0,0 +1,30 @@
+---
+import Layout from '../layouts/Layout.astro';
+import Nav from '../components/Nav.astro';
+import Hero from '../components/Hero.astro';
+import Concept from '../components/Concept.astro';
+import Pourquoi from '../components/Pourquoi.astro';
+import Configurations from '../components/Configurations.astro';
+import Architecture from '../components/Architecture.astro';
+import CasUsage from '../components/CasUsage.astro';
+import Equipe from '../components/Equipe.astro';
+import Roadmap from '../components/Roadmap.astro';
+import Contact from '../components/Contact.astro';
+import Footer from '../components/Footer.astro';
+---
+
+<Layout>
+  <Nav />
+  <main id="main">
+    <Hero />
+    <Concept />
+    <Pourquoi />
+    <Configurations />
+    <Architecture />
+    <CasUsage />
+    <Equipe />
+    <Roadmap />
+    <Contact />
+  </main>
+  <Footer />
+</Layout>