feat: health check and upload speed features

[webbdays]

Work: Completed.

1. health check feature where we show green or blue dot on top-right of the app. user can click on it for more details.
2. upload speed feature where we show "upload speed" metric at the bottom-middle of the screen. user can click on it for more details.
3. written test cases.(not yet for all)

fixes #73 /claim #73

Kindly let me know any need for improvements. Thank you.