core: allow renaming & merging of trackers with config (part 1 #8355) (#8608)
* rename site field to id in yaml indexers
* add id field in c# indexers
* use id field instead of class name in c#
as they lead to details apges without .torrent or magnets.
- also fetch up to 5 pages (14 rows per page)
- add new cat
- add .Today.Year to keyword-less search for TEST