docs,api-ref: added search filters (#4830)

* initial implementation of search modal

* added hit and search suggestions

* added support for multiple indices

* updated sample env

* added close when click outside dropdown

* test for mobile

* added mobile design

* added shortcut

* dark mode fixes

* added search to docs

* added plugins filter

* added React import

* moved filters to configurations

* handled error on page load

* change suggestion text

* removed hits limit

* handle select all

* open link in current tab

* change highlight colors

* added support for shortcuts + auto focus

* change header and footer

* redesigned search ui

www/api-reference/app/api/algolia/route.tsx

@@ -15,7 +15,7 @@ export async function GET() {
     process.env.ALGOLIA_WRITE_API_KEY || ""
   )
   const index = algoliaClient.initIndex(
-    process.env.NEXT_PUBLIC_ALGOLIA_INDEX_NAME || ""
+    process.env.NEXT_PUBLIC_API_ALGOLIA_INDEX_NAME || ""
   )
 
   // retrieve tags and their operations to index them