Previously ghostty_terminal_set required all values to be passed as pointers to the value, even when the value itself was already a pointer (userdata, function pointer callbacks). This forced callers into awkward patterns like compound literals or intermediate variables just to take the address of a pointer. Now pointer-typed options (userdata and all callbacks) are passed directly as the value parameter. Only non-pointer types like GhosttyString still require a pointer to the value. This simplifies InType to return the actual stored type for each option and lets setTyped work with those types directly.