Add internal-repo octicon for public repos of private org (#11529)

* Show multiple octicons on repo list

* fix mixed spaces/tabs

* Internal repo octicon

* show internal icon in dashboard repolist

* swagger

* fix icon for normal repo on repo page

* don't expose owner visibility directly; provide internal in repo api

* fix icons for forks and mirrors

Co-authored-by: Lauris BH <lauris@nix.lv>

web_src/js/index.js

@@ -2962,6 +2962,8 @@ function initVueComponents() {
           return `octicon-repo-template${repo.private ? '-private' : ''}`;
         } if (repo.private) {
           return 'octicon-lock';
+        } if (repo.internal) {
+          return 'octicon-internal-repo';
         }
         return 'octicon-repo';
       }