toml parser update + 'toml' module is built-in now

src/window/input.hpp

@@ -103,6 +103,7 @@ enum class mousecode : int {
     BUTTON_1 = 0, // Left mouse button
     BUTTON_2 = 1, // Right mouse button
     BUTTON_3 = 2, // Middle mouse button
+    UNKNOWN = -1,
 };
 
 inline mousecode MOUSECODES_ALL[] {
@@ -115,6 +116,8 @@ namespace input_util {
     void initialize();
 
     keycode keycode_from(const std::string& name);
+    mousecode mousecode_from(const std::string& name);
+
     /// @return Key label by keycode
     std::string to_string(keycode code);
     /// @return Mouse button label by keycode