Add speed reporting (MPH or KPH)

I'm not sure if this has been requested before (or if this is the right place to put this), but I think it would be cool to add speed to both the FMD server uploads and when you locate a device-

This would be semi-useful to see if the device is moving or not- or for me- I'm currently working on making a Kind of life360 replacement to have more control over data and analyze it and having speed would be really nice!

I might try and make a PR* but my skills in the Android and Go department are kinda iffy just wanna see what the community thinks!

I just wanna say a big thanks to everyone who works on fmd, it is GREAT, love to see where it goes!

Edit:

Also, taking a look at the API, there are also a few more cool things, like heading and altitude that would be nice, just shoving as much data as you can- not sure if anyone would find this useful (or accurate) or not but its interesting data to have

Just trying to see what people think and if the idea is on the table