Reworked late hooking

src/steam_api/steam_interfaces.hpp

@@ -3,7 +3,16 @@
 #include "smoke_api/types.hpp"
 
 namespace steam_interfaces {
+    void hook_virtuals(const void* interface_ptr, const std::string& version_string);
 
-    void hook_virtuals(void* interface_ptr, const std::string& version_string);
-
+    /**
+     * A fallback mechanism used when SteamAPI has already been initialized.
+     * It will hook the SteamClient interface and hook its interface accessors.
+     * This allows us to hook interfaces that are no longer being created,
+     * such as in the case of late injection.
+     */
+    void hook_steamclient_interface(
+        HMODULE steamclient_handle,
+        const std::string& steam_client_interface_version
+    ) noexcept;
 }