feat: add 755 (#3557)

lib/router.js

@@ -2024,6 +2024,9 @@ router.get('/bahamut/creation_index/:category?/:subcategory?/:type?', require('.
 // CentBrowser
 router.get('/centbrowser/history', require('./routes/centbrowser/history'));
 
+// 755
+router.get('/755/user/:username', require('./routes/755/user'));
+
 // Mastodon
 router.get('/mastodon/timeline/:site/:only_media?', require('./routes/mastodon/timeline'));