✨ feat(blog): Enhance blog homepage

This commit introduces several improvements to the blog homepage:

- Adds a search icon and link to the Russian version of the blog
- Reduces the font size of the main title to make it more visually balanced
- Updates the blog description to focus on posts about science
- Adjusts the overall layout and spacing for a more polished appearance

These changes aim to enhance the user experience and better communicate the blog's content and focus.

public/moon.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 18 20">
+  <path stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8.509 5.75c0-1.493.394-2.96 1.144-4.25h-.081a8.5 8.5 0 1 0 7.356 12.746A8.5 8.5 0 0 1 8.509 5.75Z"/>
+</svg>