Add detected file language to code search (#10256)

Move langauge detection to separate module to be more reusable

Add option to disable vendored file exclusion from file search

Allways show all language stats for search

web_src/less/_base.less

@@ -1193,6 +1193,10 @@ i.icon.centerlock {
     border-radius: 500em;
 }
 
+.ui.label > .color-icon {
+    margin-left: 0;
+}
+
 .invisible {
     visibility: hidden;
 }