docs: add device authentication with PIN and biometrics guide

.prettierrc.js

@@ -5,7 +5,16 @@ module.exports = {
   ...require("ory-prettier-styles"),
   overrides: [
     {
-      files: ["docs/**/*.md", "docs/**/*.mdx"],
+      // The deviceauthn partials carry inline <SameDeploymentLink> elements whose
+      // opening tags exceed 80 characters. At the default width, prettier pushes
+      // those tags onto their own lines, which MDX then parses as block-level JSX
+      // and breaks the surrounding paragraph or list item.
+      files: [
+        "docs/**/*.md",
+        "docs/**/*.mdx",
+        "src/components/Shared/kratos/passwordless/deviceauthn/*.mdx",
+        "src/components/Shared/kratos/01_mfa-overview.mdx",
+      ],
       options: {
         printWidth: 130,
       },