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

Conflicts:
- `README.md`:
  Upstream added a link to the roadmap, but we have a completely different README.
  Kept ours.
- `app/models/media_attachment.rb`:
  Upstream upped media attachment limits.
  Updated the default according to upstream's.
- `db/migrate/20180831171112_create_bookmarks.rb`:
  Upstream changed the migration compatibility level.
  Did so too.
- `config/initializers/content_security_policy.rb`:
  Upstream refactored this file but we have a different version.
  Kept our version.
- `app/controllers/settings/preferences_controller.rb`:
  Upstream completely refactored user settings storage, and glitch-soc has a
  different set of settings.
  The file does not directly references individual settings anymore.
  Applied upstream changes.
- `app/lib/user_settings_decorator.rb`:
  Upstream completely refactored user settings storage, and glitch-soc has a
  different set of settings.
  The file got removed entirely.
  Removed it as well.
- `app/models/user.rb`:
  Upstream completely refactored user settings storage, and glitch-soc has a
  different set of settings.
  References to individual settings have been removed from the file.
  Removed them as well.
- `app/views/settings/preferences/appearance/show.html.haml`:
  Upstream completely refactored user settings storage, and glitch-soc has a
  different set of settings.
  Applied upstream's changes and ported ours back.
- `app/views/settings/preferences/notifications/show.html.haml`:
  Upstream completely refactored user settings storage, and glitch-soc has a
  different set of settings.
  Applied upstream's changes and ported ours back.
- `app/views/settings/preferences/other/show.html.haml`:
  Upstream completely refactored user settings storage, and glitch-soc has a
  different set of settings.
  Applied upstream's changes and ported ours back.
- `config/settings.yml`:
  Upstream completely refactored user settings storage, and glitch-soc has a
  different set of settings.
  In particular, upstream removed user-specific and unused settings.
  Did the same in glitch-soc.
- `spec/controllers/application_controller_spec.rb`:
  Conflicts due to glitch-soc's theming system.
  Mostly kept our version, as upstream messed up the tests.

.github/workflows/lint-haml.yml

@@ -30,7 +30,9 @@ jobs:
         uses: actions/checkout@v3
 
       - name: Install native Ruby dependencies
-        run: sudo apt-get install -y libicu-dev libidn11-dev
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libicu-dev libidn11-dev
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1

.github/workflows/test-migrations-one-step.yml

@@ -16,7 +16,7 @@ jobs:
       - id: skip_check
         uses: fkirc/skip-duplicate-actions@v5
         with:
-          paths: '["Gemfile*", ".ruby-version", "**/*.rb", ".github/workflows/test-migrations-one-step.yml"]'
+          paths: '["Gemfile*", ".ruby-version", "**/*.rb", ".github/workflows/test-migrations-one-step.yml", "lib/tasks/tests.rake"]'
 
   test:
     runs-on: ubuntu-latest
@@ -64,7 +64,9 @@ jobs:
       - uses: actions/checkout@v3
 
       - name: Install native Ruby dependencies
-        run: sudo apt-get install -y libicu-dev libidn11-dev
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libicu-dev libidn11-dev
 
       - name: Set up bundler cache
         uses: ruby/setup-ruby@v1

.github/workflows/test-migrations-two-step.yml

@@ -16,7 +16,7 @@ jobs:
       - id: skip_check
         uses: fkirc/skip-duplicate-actions@v5
         with:
-          paths: '["Gemfile*", ".ruby-version", "**/*.rb", ".github/workflows/test-migrations-two-step.yml"]'
+          paths: '["Gemfile*", ".ruby-version", "**/*.rb", ".github/workflows/test-migrations-two-step.yml", "lib/tasks/tests.rake"]'
 
   test:
     runs-on: ubuntu-latest
@@ -63,7 +63,9 @@ jobs:
       - uses: actions/checkout@v3
 
       - name: Install native Ruby dependencies
-        run: sudo apt-get install -y libicu-dev libidn11-dev
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libicu-dev libidn11-dev
 
       - name: Set up bundler cache
         uses: ruby/setup-ruby@v1

.github/workflows/test-ruby.yml

@@ -32,7 +32,9 @@ jobs:
           node-version-file: '.nvmrc'
 
       - name: Install native Ruby dependencies
-        run: sudo apt-get install -y libicu-dev libidn11-dev
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libicu-dev libidn11-dev
 
       - name: Set up bundler cache
         uses: ruby/setup-ruby@v1
@@ -119,6 +121,9 @@ jobs:
           path: './public'
           name: ${{ github.sha }}
 
+      - name: Update package index
+        run: sudo apt-get update
+
       - name: Install native Ruby dependencies
         run: sudo apt-get install -y libicu-dev libidn11-dev