Move tributejs to npm/webpack (#11497)

* Move tributejs to npm/webpack

- Move vendored bundle to npm and webpack
- Rewrote initialization to single function
- Restyled it (made it a bit smaller)
- Fixed it for arc-green

* fix mention

* also include emoji on #content

* Update web_src/less/_tribute.less

Co-authored-by: mrsdizzie <info@mrsdizzie.com>

* rewrite to only use one instance of Tribute

* refactor

* fix copy/paste error

Co-authored-by: mrsdizzie <info@mrsdizzie.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.io>

public/vendor/plugins/tribute/tribute.css

@@ -1,27 +0,0 @@
-.tribute-container {
-  position: absolute;
-  top: 0;
-  left: 0;
-  height: auto;
-  max-height: 300px;
-  max-width: 500px;
-  overflow: auto;
-  display: block;
-  z-index: 999999; }
-  .tribute-container ul {
-    margin: 0;
-    margin-top: 2px;
-    padding: 0;
-    list-style: none;
-    background: #efefef; }
-  .tribute-container li {
-    padding: 5px 5px;
-    cursor: pointer; }
-    .tribute-container li.highlight, .tribute-container li:hover {
-      background: #ddd; }
-    .tribute-container li span {
-      font-weight: bold; }
-    .tribute-container li.no-match {
-      cursor: default; }
-  .tribute-container .menu-highlighted {
-    font-weight: bold; }