Add quick approve button on PR page (#35678)

This PR adds a quick approve button on PR page to allow reviewers to
approve all pending checks. Only users with write permission to the 
Actions unit can approve.

---------

Signed-off-by: Zettat123 <zettat123@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/web/repo/issue_view.go

@@ -437,6 +437,9 @@ func ViewIssue(ctx *context.Context) {
 
 func ViewPullMergeBox(ctx *context.Context) {
 	issue := prepareIssueViewLoad(ctx)
+	if ctx.Written() {
+		return
+	}
 	if !issue.IsPull {
 		ctx.NotFound(nil)
 		return