Show followed hashtags above posts & include a following property with status tags

[GeopJr]

Pitch

Some apps (Megalodon & forks, Phanpy) show the followed hashtags above posts that end up on the home timeline as a result of following a hashtag. They do it by keeping track of followed hashtags themselves.

It'd be nice if at least glitch-soc added this both on the ui and the API.

related issues & PRs:
mastodon#19528
mastodon#28874

Motivation

I don't have strong opinions on the web ui side of things, but as a client maintainer, the following approach seems more appropriate than constantly syncing tags and keeping track of them locally:

{
	"tags": [
		{
			"name": "gnome",
			"url": "https://tech.lgbt/tags/gnome",
			"following": true
		},
		{
			"name": "test",
			"url": "https://tech.lgbt/tags/test"
		}
	]
}

Eugen seems positive about it mastodon#19528 (comment) it might be worth adding it to glitch-soc in advance so it matures and clients implement it until upstream adds it