Retire the 1.0.0 installer and take dead macOS links off the site

Deleting the old Windows build from R2 surfaced something worse: the
two macOS DMG links had no objects behind them at all - the mac builds
were never uploaded, so every mac download click has been a 404.

- R2 now holds exactly one desktop artifact: AC/AgentCompany-1.1.0-x64
  .exe (old exe deleted on operator instruction, verified 404)
- The release manifest drops the macOS entry with a comment explaining
  how it comes back (upload real DMGs first); footer mac links removed;
  hero reads "Available on Windows - macOS build coming soon"
- Root fix in platform-support: FAQ/JSON-LD copy now derives from
  whatever platforms the manifest actually ships instead of
  hard-requiring macos+windows, so the site structurally cannot
  advertise a platform without a real artifact behind it
- Landing e2e updated (>=1 tracked asset) and green; redeployed and
  verified live: no r2.dev leaks, no mac links, coming-soon copy shown,
  tracked download 302s to the 1.1.0 installer

landing/tests/e2e/landing.spec.ts

@@ -40,8 +40,10 @@ test("download links use the tracked endpoint and never expose R2 URLs", async (
   await page.goto("/");
   await scrollThrough(page);
 
+  // Every advertised platform asset routes through the tracked endpoint
+  // (currently Windows only - macOS returns once its build ships to R2).
   const tracked = page.locator('#download a[href^="/api/download?asset="]');
-  expect(await tracked.count()).toBeGreaterThanOrEqual(3);
+  expect(await tracked.count()).toBeGreaterThanOrEqual(1);
 
   // Real release URLs must stay behind the server-side redirect.
   expect(await page.locator('a[href*="r2.dev"]').count()).toBe(0);