FTC Dashboard Support

[j5155]

This adds support for receiving telemetry, status, and config from FTC Dashboard running on an FTC robot. Communication is via JSON websockets.

• Basic Telemetry
• Timestamps and backlogging for significantly better time resolution
• Getting robot status
• Pose (via guessing); need to allow for heading (deg)
• Config getting and setting
• Multiple poses (detect multiple sets of telemetry variables ending with x, y, and heading? Auto interpret a heading as degrees if it's larger then 2pi?)
• Proper reconnection
• Field drawing as poses? (this might be impossible)

[j5155]

Okay, I think this is fully working now. Testing without an FTC robot might be a little difficult; I've been using https://github.com/jdhs-ftc/DashReplayView/ (my previous roadrunner log parser, that used ftc dashboard as a backend), and the upstream backend tests could be used too.

[j5155]

I've added running detection as well.
Intentionally missing features:
Enum config support
DS features (OpMode selection/start/stop)

These could easily technically be added, but would require changes to AdvantageScope and might be out of scope based on other closed PRs.

[jwbonner]

Intentionally missing features:
Enum config support
DS features (OpMode selection/start/stop)

I think both of these are reasonable omissions given what AdvantageScope supports for existing formats. Looks like this PR is based on a slightly older version of the Road Runner format PR, but if you get it up-to-date it's probably close to being ready to merge (maybe with a few minor tweaks).