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/docs/.vitepress/theme/search.css

@@ -45,7 +45,7 @@
 .algolia
   [command-dialog-wrapper]:has([command-input]:placeholder-shown)
   [command-empty=""]::after {
-  content: "Search 240 tools, guides, and the API reference";
+  content: "Search 200+ tools, guides, and the API reference";
   font-size: 14px;
   line-height: 1.4;
   color: var(--vp-c-text-2);