Remove finmoji and add a way to download emojis in packs

config/config.exs

lib/mix/tasks/pleroma/emoji.ex

lib/pleroma/emoji.ex

priv/static/finmoji/1000px/a_trusted_friend.png

priv/static/finmoji/1000px/alandislands.png

priv/static/finmoji/1000px/association.png

priv/static/finmoji/1000px/auroraborealis.png

priv/static/finmoji/1000px/baby_in_a_box.png

priv/static/finmoji/1000px/bear.png

priv/static/finmoji/1000px/black_gold.png

priv/static/finmoji/1000px/christmasparty.png

priv/static/finmoji/1000px/crosscountryskiing.png

priv/static/finmoji/1000px/cupofcoffee.png

priv/static/finmoji/1000px/education.png

priv/static/finmoji/1000px/fashionista_finns.png

priv/static/finmoji/1000px/finnishlove.png

priv/static/finmoji/1000px/flag.png

priv/static/finmoji/1000px/forest.png

priv/static/finmoji/1000px/four_seasons_of_bbq.png

priv/static/finmoji/1000px/girlpower.png