🎩 What? Why?

Refactors the assemblies seeds to individual methods.

This is following the same methodology and reasoning from #12005, so refer to that issue for the explanations.

Testing

Regenerating the development_app database should have different kind of proposals (almost the same as before):

$ bin/rails db:drop db:create db:migrate db:seed

For making magic:

bin/rails runner "200.times { Decidim::Assemblies::Seeds.new.create_assembly! }"

♥️ Thank you!