Clarify in the docs that you need to be logged in to use code search (#37454)

Co-authored-by: mc <42146119+mchammer01@users.noreply.github.com>

content/search-github/github-code-search/about-github-code-search.md

@@ -14,6 +14,8 @@ topics:
 
 Code search is integrated with features in the search interface on {% data variables.product.prodname_dotcom_the_website %}, such as suggestions, completions, and the ability to save your searches. For more information, see "[AUTOTITLE](/search-github/github-code-search/using-github-code-search)."
 
+{% data reusables.search.code-search-login-requirement %}
+
 {% data reusables.search.non-code-search-explanation %}
 
 ## Limitations

content/search-github/github-code-search/index.md

@@ -1,6 +1,6 @@
 ---
 title: GitHub Code Search
-intro: 'You can use a wide range of syntax to search {% data variables.product.product_name %}. You can adjust the scope of your search, build and troubleshoot queries, and narrow down search results with qualifiers.'
+intro: 'Learn how to use code search to find, navigate, and understand code across {% data variables.product.prodname_dotcom %}.'
 allowTitleToDifferFromFilename: true
 versions:
   feature: code-search-code-view

content/search-github/github-code-search/using-github-code-search.md

@@ -14,6 +14,8 @@ topics:
 
 Not all code is indexed, and you can currently only search the default branches of repositories. For more information on known limitations, see "[AUTOTITLE](/search-github/github-code-search/about-github-code-search#limitations)."
 
+{% data reusables.search.code-search-login-requirement %}
+
 ## Using the search bar
 
 You can search using the search interface on {% data variables.product.prodname_dotcom_the_website %}. Using suggestions, completions, and saved searches, you can quickly find what you are looking for, often without having to fully type a query or view the search results page.