✨ 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/globe.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 21 20">
+  <path stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6.487 1.746c0 4.192 3.592 1.66 4.592 5.754 0 .828 1 1.5 2 1.5s2-.672 2-1.5a1.5 1.5 0 0 1 1.5-1.5h1.5m-16.02.471c4.02 2.248 1.776 4.216 4.878 5.645C10.18 13.61 9 19 9 19m9.366-6h-2.287a3 3 0 0 0-3 3v2m6-8a9 9 0 1 1-18 0 9 9 0 0 1 18 0Z"/>
+</svg>

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>

public/sun.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 20 20">
+  <path stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 3V1m0 18v-2M5.05 5.05 3.636 3.636m12.728 12.728L14.95 14.95M3 10H1m18 0h-2M5.05 14.95l-1.414 1.414M16.364 3.636 14.95 5.05M14 10a4 4 0 1 1-8 0 4 4 0 0 1 8 0Z"/>
+</svg>