fix(TargetDevice): support immediate event writes

[ShadowApex]

This change adds immediate event writes to all target devices, significantly reducing input latency. In the previous implementation, input events are queued in a channel and only processed after the defined polling interval (typically between 1-8ms). This could cause input latency up to the duration of the polling interval.

This implementation removes that potential latency by splitting up the reading/writing into two separate tasks. The writer task will process writes as they come in and dispatch them to the target device implementation immediately instead of waiting for the next polling interval.

[pastaq]

Aside from a rebase, what is this waiting on?

[ShadowApex]

Closed in favor of #523