Add user/organization code search (#19977)

Fixes #19925 

Screenshots:

![attels](https://user-images.githubusercontent.com/165205/173864718-fe789429-55bc-4cad-808c-9f02f335cddf.png)

options/locale/locale_en-US.ini

@@ -268,8 +268,11 @@ users = Users
 organizations = Organizations
 search = Search
 code = Code
+search.type.tooltip = Search type
 search.fuzzy = Fuzzy
+search.fuzzy.tooltip = Include results that also matches the search term closely
 search.match = Match
+search.match.tooltip = Include only results that matches the exact search term
 code_search_unavailable = Currently code search is not available. Please contact your site administrator.
 repo_no_results = No matching repositories found.
 user_no_results = No matching users found.
@@ -507,6 +510,7 @@ activity = Public Activity
 followers = Followers
 starred = Starred Repositories
 watched = Watched Repositories
+code = Code
 projects = Projects
 following = Following
 follow = Follow
@@ -1763,8 +1767,11 @@ activity.git_stats_deletion_n = %d deletions
 
 search = Search
 search.search_repo = Search repository
+search.type.tooltip = Search type
 search.fuzzy = Fuzzy
+search.fuzzy.tooltip = Include results that also matches the search term closely
 search.match = Match
+search.match.tooltip = Include only results that matches the exact search term
 search.results = Search results for "%s" in <a href="%s">%s</a>
 search.code_no_results = No source code matching your search term found.
 search.code_search_unavailable = Currently code search is not available. Please contact your site administrator.
@@ -2310,6 +2317,7 @@ create_org = Create Organization
 repo_updated = Updated
 people = People
 teams = Teams
+code = Code
 lower_members = members
 lower_repositories = repositories
 create_new_team = New Team