Support current path in Windows

Teletypewriter should be able to retrieve current path on windows as well

            #[cfg(not(target_os = "windows"))]
            {
                if let Ok(path) = teletypewriter::foreground_process_path(
                    *current_context.main_fd,
                    current_context.shell_pid,
                ) {
                    working_dir = Some(path.to_string_lossy().to_string());
                }
            }

            #[cfg(target_os = "windows")]
            {
                // if let Ok(path) = teletypewriter::foreground_process_path() {
                //     working_dir =
                //         Some(path.to_string_lossy().to_string());
                // }
                working_dir = None;
            }
        }

https://github.com/raphamorim/rio/blob/4ad69ffd5402cebd34e6acfe04bb0e6dd05f1752/frontends/rioterm/src/context.rs#L630-L648

Start in frontends/rioterm/src/context.rs around the platform-specific blocks at lines 630-648. Trace how the non-Windows branch retrieves the foreground process path, then investigate the Windows equivalent; done means Teletypewriter supplies the current path on Windows instead of leaving working_dir unset.