feat: add release reactions and a GitHub-like reaction bar (#38415)

Adds emoji reactions to releases and moves the reaction picker of
issues, comments and releases into a GitHub-like reaction bar.

- Releases omit 👎 or 😕
- Drafts and tags can't be reacted to
- Moved menu to tippy
- Added keyboard navigation

Fixes: https://github.com/go-gitea/gitea/issues/34268
Fixes: https://github.com/go-gitea/gitea/issues/16676
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

modules/templates/helper.go

@@ -93,9 +93,6 @@ func newFuncMapWebPage() template.FuncMap {
 		"ShowFooterPoweredBy": func() bool {
 			return setting.Other.ShowFooterPoweredBy
 		},
-		"AllowedReactions": func() []string {
-			return setting.UI.Reactions
-		},
 		"MetaAuthor": func() string {
 			return setting.UI.Meta.Author
 		},