feat: New APIs for search (#6564)

- Adding new API endpoints for search
- Migrations to add appropriate indexes

db/migrate/20230224124632_add_index_for_search_operations.rb

@@ -0,0 +1,6 @@
+class AddIndexForSearchOperations < ActiveRecord::Migration[6.1]
+  def change
+    enable_extension('pg_trgm')
+    Migration::AddSearchIndexesJob.perform_later
+  end
+end