Add accessible-autocomplete

The stylesheet couldn't be imported using the sass @import directive, so
instead we link to it as a separate stylesheet file instead of bundling
it in. This is probably more cache-friendly as the autocomplete upstream
CSS will change less frequently than our application bundle CSS.

app/views/layouts/application.html.erb

@@ -6,6 +6,7 @@
 
     <title><%= page_title(@service_name) %></title>
 
+    <%= stylesheet_link_tag "accessible-autocomplete.min", "data-turbo-track": Rails.env.development? ? "" : "reload" %>
     <%= stylesheet_link_tag "application", "data-turbo-track": Rails.env.development? ? "" : "reload" %>
     <%= javascript_include_tag "application", "data-turbo-track": Rails.env.development? ? "" : "reload", defer: true %>
 

config/initializers/assets.rb

@@ -7,6 +7,9 @@
 
 # Add additional assets to the asset load path.
 # Rails.application.config.assets.paths << Emoji.images_path
+Rails.application.config.assets.paths << Rails.root.join(
+  "node_modules/accessible-autocomplete/dist"
+)
 
 # Precompile additional assets.
 # application.js, application.css, and all non-JS/CSS in the app/assets

package.json

@@ -4,6 +4,7 @@
   "dependencies": {
     "@hotwired/stimulus": "^3.2.2",
     "@hotwired/turbo-rails": "^8.0.10",
+    "accessible-autocomplete": "^3.0.1",
     "esbuild": "^0.24.0",
     "govuk-frontend": "^5.6.0",
     "idb": "^8.0.0",

yarn.lock

@@ -1895,6 +1895,11 @@ abab@^2.0.6:
   resolved "https://registry.yarnpkg.com/abab/-/abab-2.0.6.tgz#41b80f2c871d19686216b82309231cfd3cb3d291"
   integrity sha512-j2afSsaIENvHZN2B8GOpF566vZ5WVk5opAiMTvWgaQT8DkbOqsTfvNAvHoRGU2zzP8cPoqys+xHTRDWW8L+/BA==
 
+accessible-autocomplete@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/accessible-autocomplete/-/accessible-autocomplete-3.0.1.tgz#8ddf4934d0b4ba6acb28de486dd505e062cdc86e"
+  integrity sha512-xMshgc2LT5addvvfCTGzIkRrvhbOFeylFSnSMfS/PdjvvvElZkakCwxO3/yJYBWyi1hi3tZloqOJQ5kqqJtH4g==
+
 acorn-globals@^7.0.0:
   version "7.0.1"
   resolved "https://registry.yarnpkg.com/acorn-globals/-/acorn-globals-7.0.1.tgz#0dbf05c44fa7c94332914c02066d5beff62c40c3"