Full-text search for authorized statuses (#6423)

* Add full-text search for authorized statuses

- Search API will return statuses that match the query
- Only for logged in users
- Only if you are author of the status,
- Or you were mentioned in it
- Or you favourited or reblogged it
- Configuration over `ES_ENABLED`, `ES_HOST`, `ES_PORT`, `ES_PREFIX`
- Run `rails chewy:deploy` to create & populate index

Fix #5880
Fix #4293
Fix #1152

* Add commented out docker-compose configuration for ES container

* Optimize index import, filter search results

* Add basic normalization to the index

* Add better stemming and normalization to the index

* Skip webfinger request if search query includes both @ and a space

* Fix code style

* Visually separate search result sections

* Fix code style issues

app/javascript/styles/mastodon/components.scss

@@ -1786,7 +1786,7 @@
   flex: 1;
   min-height: 47px;
 
-  > img { 
+  > img {
     display: block;
     object-fit: contain;
     object-position: bottom left;
@@ -3229,6 +3229,43 @@
   font-weight: 500;
 }
 
+.search-results__section {
+  margin-bottom: 20px;
+
+  h5 {
+    position: relative;
+
+    &::before {
+      content: "";
+      display: block;
+      position: absolute;
+      left: 0;
+      right: 0;
+      top: 50%;
+      width: 100%;
+      height: 0;
+      border-top: 1px solid lighten($ui-base-color, 8%);
+    }
+
+    span {
+      display: inline-block;
+      background: $ui-base-color;
+      color: $ui-primary-color;
+      font-size: 14px;
+      font-weight: 500;
+      padding: 10px;
+      position: relative;
+      z-index: 1;
+      cursor: default;
+    }
+  }
+
+  .account:last-child,
+  & > div:last-child .status {
+    border-bottom: 0;
+  }
+}
+
 .search-results__hashtag {
   display: block;
   padding: 10px;