Enhance logging and progress handling in SSH operations

- Updated the `_log_default` function to handle messages starting with `\r` for in-place updates.
- Introduced `split_ssh_stream` to differentiate between line and progress events in SSH output.
- Implemented `feed_ssh_log` to dispatch log messages based on event type.
- Refactored `_stream_pty_output` to utilize the new logging and event handling functions.
- Enhanced the `log` function in `term.py` to support progress updates, ensuring a cleaner output experience.
- Updated `DownloadProgress` classes in `civitai_fetch.py` and `llamacpp_fetch.py` to print progress in place, improving user feedback during downloads.

src/gpu_rent/remote/ollama_pull.py

@@ -96,7 +96,9 @@ def pull_stream(name: str, label: str) -> None:
                 if now - last_print >= 1.0 or done >= total:
                     elapsed = max(now - t0, 0.001)
                     speed = done / elapsed
-                    print(progress_line(label, done, total, speed), flush=True)
+                    line = progress_line(label, done, total, speed)
+                    end = "\n" if done >= total else "\r"
+                    print(line, end=end, flush=True)
                     last_print = now
             elif status and status not in {"success"} and now - last_print >= 2.0:
                 print(f"{label} {status}", flush=True)