Fix search result truncation to improve scannability (#6485)

- Truncate search result previews to 3 lines maximum
- Improves user ability to scan and find relevant results quickly
- Prevents display of entire page content (e.g., 900 words) in search results

Signed-off-by: codeEvolveZenith345 <suntiwari3495@gmail.com>

Author: codeEvolveZenith345

docs/stylesheets/extra.css

@@ -671,4 +671,26 @@ a.md-header__button.md-logo img {
   .pipe {
     display: none;
   }
+}
+
+.md-search-result__article {
+  max-height: none;
+}
+
+.md-search-result__teaser,
+article.md-search-result__article p:not(.md-search-result__meta) {
+  display: -webkit-box;
+  -webkit-line-clamp: 3;
+  -webkit-box-orient: vertical;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  line-height: 1.5;
+  max-height: 4.5em;
+}
+
+.md-search-result__article > p {
+  display: -webkit-box;
+  -webkit-line-clamp: 3;
+  -webkit-box-orient: vertical;
+  overflow: hidden;
 }