Refactor media upload

Use Upload Media logic from Pleroma

Backend changes for picture upload

Move AS <-> Model conversion to separate module

Front changes

Downgrade apollo-client: https://github.com/Akryum/vue-apollo/issues/577

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

.credo.exs

@@ -100,7 +100,7 @@
         #
         {Credo.Check.Refactor.CondStatements, []},
         {Credo.Check.Refactor.CyclomaticComplexity, []},
-        {Credo.Check.Refactor.FunctionArity, []},
+        {Credo.Check.Refactor.FunctionArity, [max_arity: 9]},
         {Credo.Check.Refactor.LongQuoteBlocks, []},
         {Credo.Check.Refactor.MatchInCondition, []},
         {Credo.Check.Refactor.NegatedConditionsInUnless, []},