* Add followed_tags route.
This at least gets us to the point where the page can actually be
rendered, although it doesn't display any hashtags (yet?).
Attempting to implement #20763.
* Fix minor issues.
* I've got the followed tags data partially working
But the Hashtag component errors for some reason. Something about the
value of the history attribute being invalid.
* Fix a mistake in the code
* Minor change.
* Get the followed hashtags list fully working.
Still need to add the Follow/Unfollow buttons, though.
* Resolve JS linter issues.
* Add pagination logic to followed tags list view.
However, it currently loads further pages immediately on page load, so
that's not ideal. Need to figure that one out.
* Appease the linter.
* Apply suggestions from code review
Co-authored-by: Claire <claire.github-309c@sitedethib.com>
* Fixes and resolve some other feedback.
* Use set/update instead of setIn/updateIn.
Co-authored-by: Claire <claire.github-309c@sitedethib.com>