docs(home): align the hero chip row with the four promises

The chip row under the docs home page hero sat directly above the
re-rendered poster, whose chips are the four promises; the row still
read the pre-slogan trio. Same markup, four spans, three separators:
Executable | AI-writable | Agent-operable | You own it.

Claude-Session: https://claude.ai/code/session_011hRnra93sK5Q2gTYYTbdJR
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

apps/docs/app/[lang]/page.tsx

@@ -258,11 +258,13 @@ export default function HomePage() {
             className="mt-8 flex flex-wrap items-center justify-center gap-x-3 gap-y-2 text-[13px] text-fd-muted-foreground"
             style={{ fontFamily: 'var(--l-mono)' }}
           >
-            <span>Fits in an agent&apos;s context</span>
+            <span>Executable</span>
             <span aria-hidden className="text-fd-border">|</span>
-            <span>Typed, validated, governed</span>
+            <span>AI-writable</span>
             <span aria-hidden className="text-fd-border">|</span>
-            <span>Self-host anywhere</span>
+            <span>Agent-operable</span>
+            <span aria-hidden className="text-fd-border">|</span>
+            <span>You own it</span>
           </div>
         </section>