Controls for node start/stop, bandwidth/size management

[olizilla]

What controls should an app provide for managing an IPFS node? Desktop let's you Start/stop the daemon, but WebUI and Companion don't.

Beyond that, bandwidth throttling, Repo size management would be super helpful. Why would a user want to stop their daemon process? Perhaps start/stop is less useful than actually being able to reduce and manage the amount of system resources it consumes.

The current state of things is described here: https://github.com/ipfs-shipyard/pm-ipfs-gui/blob/master/research/README.md#start--stop-ipfs-node