Merge branch 'main' into glitch-soc/merge-upstream

Conflicts:
- `README.md`:
  Upstream README has been changed, but we have a completely different one.
  Kept our `README.md`.
- `lib/sanitize_ext/sanitize_config.rb`:
  Upstream added support for more incoming HTML tags (a large subset of what
  glitch-soc accepts).
  Change the code style to match upstream's but otherwise do not change our
  code.
- `spec/lib/sanitize_config_spec.rb`:
  Upstream added support for more incoming HTML tags (a large subset of what
  glitch-soc accepts).
  Kept our version, since the tests are mostly glitch-soc's, except for cases
  which are purposefuly different.

Gemfile

@@ -104,8 +104,6 @@ group :development, :test do
   gem 'fabrication', '~> 2.30'
   gem 'fuubar', '~> 2.5'
   gem 'i18n-tasks', '~> 1.0', require: false
-  gem 'pry-byebug', '~> 3.10'
-  gem 'pry-rails', '~> 0.3'
   gem 'rspec-rails', '~> 6.0'
   gem 'rubocop-performance', require: false
   gem 'rubocop-rails', require: false
@@ -119,7 +117,6 @@ end
 
 group :test do
   gem 'capybara', '~> 3.38'
-  gem 'climate_control', '~> 0.2'
   gem 'faker', '~> 3.1'
   gem 'json-schema', '~> 3.0'
   gem 'rack-test', '~> 2.0'