add image gallery slider & emoji in topic singl page and othrs improvment

tailwind.config.mjs

@@ -3,6 +3,9 @@ export default {
   content: ['./src/**/*.{astro,html,js,jsx,md,mdx,svelte,ts,tsx,vue}'],
   theme: {
     extend: {
+      boxShadow: {
+        xl: '0 10px 30px rgba(0, 0, 0, 0.3)',
+      },
       colors: {
         'sp-dark': '#2b323b',
         'sp-light': '#c7ccd5',