chore: use "200+ tools" for the tool-count claim across public surfaces (#364)

* fix(landing): correct PDF tool count to 28 in alternatives copy

The pdf section has 28 tools (section.test.ts asserts bySection('pdf')=28). PR #363 corrected the docs breakdown but the alternatives pages still said 40 PDF tools (the document-modality count, not the pdf section) with 200 for the rest. Update to 28 PDF tools and 212 for the non-PDF remainder.

* chore: use "200+ tools" for the tool-count claim across public surfaces

Replaces the exact '240 tools' count (which drifts as tools are added) with the stable '200+ tools' on README, the Docker Hub overview, landing pages, the docs site (meta, homepage, search), the API self-description, the demo OG tag, llms.txt, package.json, the branding readme, and the en/nl app strings. Per-modality breakdown tables stay exact. Leaves the architecture doc's technical 'tool routes' figure, an internal vitest comment, and a QA report line unchanged. Updates the two tests that assert the docs strings.

apps/landing/src/pages/alternatives/[slug].astro

@@ -215,7 +215,7 @@ const allJsonLd = [breadcrumbJsonLd, ...(faqJsonLd ? [faqJsonLd] : [])];
             Run it on your own server
           </h2>
           <p class="mx-auto mt-4 max-w-lg text-muted">
-            240 tools across image, video, audio, PDF, and files. Open source, free forever, and your
+            200+ tools across image, video, audio, PDF, and files. Open source, free forever, and your
             files never leave your network.
           </p>
           <div class="mt-8 flex flex-wrap justify-center gap-4">