chore: remove duplicate FernBreadcrumbs.scss and add not-prose class

- Remove old FernBreadcrumbs.scss from bundle/src/components
- Remove import from bundle's index.scss (now using shared component styles)
- Add 'not-prose' class to header wrapper div in PageContents
- Addresses PR feedback from @sbawabe

Co-Authored-By: Sarah Bawabe <[email protected]>

Author: devin-ai-integration[bot]

packages/fern-dashboard/src/app/[orgName]/(visual-editor)/editor/[docsUrl]/[branch]/[...slug]/PageContents.tsx

@@ -82,7 +82,7 @@ export default function PageContents({ filename, initialHtml, initialFrontmatter
     return (
         <div className="max-w-content-width-wide mx-auto w-full pb-64">
             {!hidePageHeader && (
-                <div className="mx-5">
+                <div className="mx-5 not-prose">
                     {breadcrumb.length > 0 && (
                         <div className="mb-2">
                             <EditorAwareBreadcrumbs breadcrumb={breadcrumb} />

packages/fern-docs/bundle/src/components/FernBreadcrumbs.scss

@@ -3,10 +3,9 @@
 @import "./css/components.scss";
 @import "./FernAnchor.scss";
 @import "./HorizontalOverflowMask.scss";
-@import "./FernBreadcrumbs.scss";
 @import "./api-reference/index.scss";
 @import "./playground/index.scss";
 @import "./changelog/index.scss";
 @import "./PageActions.scss";
 @import "./themes/index.scss";
-@import "./bottom-nav.scss";
+@import "./bottom-nav.scss";