- Introduced a new script `make-blog-cover.mjs` to create a default cover image for blog posts.
- The image is generated in PNG format with dimensions 1200x630, suitable for Open Graph.
- Utilizes the site's branding colors and logo from `public/nobat724.svg`.
- Includes custom font styling using the Vazirmatn font.
- The generated image is saved to `public/assets/images/blog-default-cover.png`.
