This adds a first attempt at tooltip showing who reacted to a message. It
doesn't limit senders or position the tooltip nicely, but the info is there at
least.
Part of https://github.com/vector-im/riot-web/issues/9722
This allows you to increment an existing reaction below a message by clicking on
it.
At the moment, this is not linked to the action bar, so they each are using
local state. We'll likely want to add some mechanism so that we can local echo
to both of these UI areas at the same time, but that can be done separately.
Fixes https://github.com/vector-im/riot-web/issues/9486
This displays the existing reactions a message has from all users below the
message.
Since we don't currently have an API to actually get these events yet,
adds a temporary hook that looks for a specific message to inject some sample
data. This helps build out the UI for now and can be removed once it exists.
Fixes https://github.com/vector-im/riot-web/issues/9573