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

Conflicts:
- `.github/workflows/build-image.yml`:
  Fix erroneous deletion in a previous merge.
- `Gemfile`:
  Conflict caused by glitch-soc-only hCaptcha dependency
- `app/controllers/auth/sessions_controller.rb`:
  Minor conflict due to glitch-soc's theming system.
- `app/controllers/filters_controller.rb`:
  Minor conflict due to glitch-soc's theming system.
- `app/serializers/rest/status_serializer.rb`:
  Minor conflict due to glitch-soc having an extra `local_only` property

package.json

@@ -46,6 +46,7 @@
     "babel-plugin-transform-react-remove-prop-types": "^0.4.24",
     "blurhash": "^1.1.5",
     "classnames": "^2.3.1",
+    "cocoon-js-vanilla": "^1.2.0",
     "color-blend": "^3.0.1",
     "compression-webpack-plugin": "^6.1.1",
     "cross-env": "^7.0.3",
@@ -73,6 +74,7 @@
     "intl-relativeformat": "^6.4.3",
     "is-nan": "^1.3.2",
     "js-yaml": "^4.1.0",
+    "jsdom": "^20.0.0",
     "lodash": "^4.17.21",
     "mark-loader": "^0.1.6",
     "marky": "^1.2.4",