feat(landing): restore Developers nav link, swap out Features anchor (#474)

Restores Developers to the top nav by swapping out the Features homepage anchor. Nav is now Enterprise, Pricing, Alternatives, Developers, Docs, Talk to a human. Updated two e2e assertions that checked for a Features nav link. Verified visually at 1120/1280px and 62/62 landing e2e.

apps/landing/src/components/Navbar.astro

@@ -6,10 +6,10 @@ import { formatCompact, getStarCount } from "@/lib/stats";
 const starCount = formatCompact(await getStarCount());
 
 const links = [
-  { label: "Features", href: "/#features" },
   { label: "Enterprise", href: "/#enterprise" },
   { label: "Pricing", href: "/#pricing" },
   { label: "Alternatives", href: "/alternatives" },
+  { label: "Developers", href: "/self-hosted/file-conversion-api" },
   { label: "Docs", href: "https://docs.snapotter.com", external: true },
   { label: "Talk to a human", href: "/contact" },
 ];