API: add authorVerified where possible + provide channel tabs list (#3625)

src/invidious/helpers/serialized_yt_data.cr

@@ -74,6 +74,7 @@ struct SearchVideo
       json.field "author", self.author
       json.field "authorId", self.ucid
       json.field "authorUrl", "/channel/#{self.ucid}"
+      json.field "authorVerified", self.author_verified
 
       json.field "videoThumbnails" do
         Invidious::JSONify::APIv1.thumbnails(json, self.id)

src/invidious/routes/api/v1/channels.cr

@@ -89,6 +89,8 @@ module Invidious::Routes::API::V1::Channels
         json.field "descriptionHtml", channel.description_html
 
         json.field "allowedRegions", channel.allowed_regions
+        json.field "tabs", channel.tabs
+        json.field "authorVerified", channel.verified
 
         json.field "latestVideos" do
           json.array do