feat: implement EditorTheme for consistent styling across editor components
feat: define types for blog-related operations including image uploads and post creation
feat: create DropdownColorPicker component for color selection in blog editor
feat: implement ImageResizer component for resizing images in the blog editor
feat: add export and import functionality for blog posts in JSON format
feat: update main application routes to include CreatePost page
feat: enhance Blog page with a button to navigate to CreatePost
feat: implement CreatePost page with title, cover image upload, and content editor
