Mastodon(4.0+) servers: trending posts, tags, and links

### Category

Social Media

### Website URL

- https://mastodon.social/explore, or `https://mastodon.example.invalid/explore`
- https://mastodon.social/explore/tags, or `https://mastodon.example.invalid/explore/tags`
- https://mastodon.social/explore/links, or `https://mastodon.example.invalid/explore/links`

### Website description

[Wikipedia](https://en.wikipedia.org/wiki/Mastodon_(social_network)):
> Mastodon is [free and open-source software](https://en.wikipedia.org/wiki/Free_and_open-source_software) for running [self-hosted](https://en.wikipedia.org/wiki/Self-hosting_(web_services)) [social networking services](https://en.wikipedia.org/wiki/Social_networking_service). It has [microblogging](https://en.wikipedia.org/wiki/Microblogging) features similar to [Twitter](https://en.wikipedia.org/wiki/Twitter), which are offered by a large number of independently run [nodes](https://en.wikipedia.org/wiki/Node_(networking)), known as [instances](https://en.wikipedia.org/wiki/Instance_(computer_science)), each with its own [code of conduct](https://en.wikipedia.org/wiki/Code_of_conduct), [terms of service](https://en.wikipedia.org/wiki/Terms_of_service), [privacy policy](https://en.wikipedia.org/wiki/Privacy_policy), privacy options, and [content moderation](https://en.wikipedia.org/wiki/Content_moderation) policies.

### What content should be included?

Trending posts, tags and links.

### Additional description

_No response_

### This is not a duplicated rss request

- [X] I have searched [existing issues](https://github.com/DIYgod/RSSHub/issues) and [pull requests](https://github.com/DIYgod/RSSHub/pulls) to ensure this rss proposal has not already been requested