feat(input/linux): add support for more virtual input devices (#2606)

Co-authored-by: ABeltramo <beltramo.ale@gmail.com>
Co-authored-by: ReenigneArcher <42013603+ReenigneArcher@users.noreply.github.com>

src/input.h

@@ -22,6 +22,9 @@ namespace input {
   [[nodiscard]] std::unique_ptr<platf::deinit_t>
   init();
 
+  bool
+  probe_gamepads();
+
   std::shared_ptr<input_t>
   alloc(safe::mail_t mail);