feat(network-quality): rework measurement model and fix manifest version

- Replace EMA smoothing with deterministic rolling window
- Only IPStatus.TimedOut counts as packet loss; ignore other errors/exceptions
- Time‑based or count‑based window as single source of truth
- Packet loss = timeouts / total * 100
- Ping = average of successful RTTs
- Jitter = mean absolute delta between consecutive valid RTTs
- No smoothing in measurement layer (optional smoothing only at display)
- Fix manifest version

simplify EMA smoothing config comment

Merge branch 'main' of https://github.com/ken47-1/InfoPanel.NetworkQu…

…ality

Fix project structure and plugin reference paths