Update doc links for code suggestions

ee/app/views/profiles/preferences/_code_suggestions_settings.html.haml

 - return unless @user.namespace.ai_assist_ui_enabled?
-- docs_link_url = help_page_path('user/project/repository/code_suggestions/index')
+- docs_link_url = help_page_url('user/project/repository/code_suggestions/index', anchor: 'start-using-code-suggestions')
 - docs_link_start = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: docs_link_url }
 - terms_link_start = '<a href="https://about.gitlab.com/handbook/legal/testing-agreement/" target="_blank" rel="noopener noreferrer">'.html_safe
+- ide_extension_url = help_page_url('user/project/repository/code_suggestions/index', anchor: 'supported-editor-extensions')
+- ide_extension_link_start = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: ide_extension_url }
 .settings-section.js-preferences-form.js-search-settings-section#code-suggestions-settings
   .settings-sticky-header
@@ -16,4 +18,4 @@
   .form-group
     = form.gitlab_ui_checkbox_component :code_suggestions,
       s_('CodeSuggestions|Enable Code Suggestions'),
-      help_text: s_('CodeSuggestions|Subject to the %{terms_link_start}Testing Terms of Use%{link_end}. Code Suggestions uses third-party AI services.').html_safe % { terms_link_start: terms_link_start, link_end: '</a>'.html_safe}
+      help_text: s_('CodeSuggestions|Subject to the %{terms_link_start}Testing Terms of Use%{link_end}. Code Suggestions uses third-party AI services.|To start receiving Code Suggestions after enabling this feature, you must install and configure a %{ide_extension_link_start}supported IDE editor extension%{link_end}.').html_safe % { terms_link_start: terms_link_start, ide_extension_link_start: ide_extension_link_start, link_end: '</a>'.html_safe}

locale/gitlab.pot

@@ -11990,6 +11990,9 @@ msgstr ""
 msgid "CodeSuggestions|Subject to the %{terms_link_start}Testing Terms of Use%{link_end}. Code Suggestions uses third-party AI services."
 msgstr ""
+msgid "CodeSuggestions|Subject to the %{terms_link_start}Testing Terms of Use%{link_end}. Code Suggestions uses third-party AI services.|To start receiving Code Suggestions after enabling this feature, you must install and configure a %{ide_extension_link_start}supported IDE editor extension%{link_end}."
+msgstr ""
+
 msgid "CodeownersValidation|An error occurred while loading the validation errors. Please try again later."
 msgstr ""