feat: enhance vitest configuration and add new components for BrainGarden

- Updated vitest.config.stories.ts to include preserveSymlinks for better symlink handling.
- Replaced ReactFlowProvider import with @xyflow/react in .storybook/preview.tsx for improved compatibility.
- Added new image and markdown files for the BrainGarden project, including hiring and feature task plan documentation.
- Introduced new shared components such as Highlight, ParagraphText, and SectionTitle with styled-components for consistent theming.
- Created CallToAction and Section components to enhance the user interface in the WhitePaper section.
- Implemented RecursiveJourney components and associated logic for better project navigation and content presentation.

Author: drumnation

.storybook/preview.tsx

@@ -4,8 +4,8 @@ import { viewports } from '../src/styles/theme/viewports'
 import { MantineProvider } from '@mantine/core'
 import { theme as mantineTheme } from '../src/styles/theme'
 import '@mantine/core/styles.css'
-import { ReactFlowProvider } from 'reactflow'
-import 'reactflow/dist/style.css'
+import { ReactFlowProvider } from '@xyflow/react'
+import '@xyflow/react/dist/style.css'
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
 
 // Add global styles for fonts