Improve title format

### What feature is it?
Enforce an universal format for all feed titles.
Currently the best format I think it could be is "Service - Type/Route name - Name"

### What problem does this feature solve?
Currently, different feeds are using different title format, for example:
|Service|Type|Format|
| ----- |:-----:|:-----:|
|F-Droid|App|\nNAME\n releases on F-Droid|
|Telegram|Channel|NAME - Telegram 频道|
|Soundcloud|User|NAME\| Free Listening on SoundCloud|
|Docker|Image|NAME build history|
|App Store|App|NAME for macOS 更新|

It's an extremely mess if I subscribe more than one type of feeds, especially when the rss aggregator doesn't allow name changing, like this [rssbot for telegram](https://github.com/iovxw/rssbot)

### Additional description
I know there is a lot of work involved in replacing title formats, but it would be a great improve for this project, and if this proposal is accepted, I can help replace them and send a PR.