Cover Finder (#216)

Adds functionality to search and add game cover images automatically.

Co-authored-by: Conn O'Griofa <connogriofa@gmail.com>
Co-authored-by: ReenigneArcher <42013603+ReenigneArcher@users.noreply.github.com>

src/httpcommon.h

@@ -12,6 +12,10 @@ int save_user_creds(
   bool run_our_mouth = false);
 
 int reload_user_creds(const std::string &file);
+bool download_file(const std::string &url, const std::string &file);
+std::string url_escape(const std::string &url);
+std::string url_get_host(const std::string &url);
+
 extern std::string unique_id;
 extern net::net_e origin_pin_allowed;
 extern net::net_e origin_web_ui_allowed;