Updated Gitea template files for proglang

TODO's

• base/footer_content
• base/head_navbar
• explore/repo_list
• org/header
• org/home
• repo/clone_buttons
• repo/course_view_list
• repo/home
• repo/sub_menu
• user/dashboard/courses
• user/dashboard/dashboard
• user/dashboard/named_feeds
• user/settings/account
• user/settings/keys
• user/settings/navbar
• user/settings/profile
• user/settings/repos
• user/profile
• home