Implement forceReset for all adapters

[Nerivec]

forceReset currently only supports adapters that do this via dtr/rts flipping (only Sonoff Dongle-E and custom adapters at the moment).
It appears to have some issues also (not always triggering properly, resulting in failed uploads for example; try without forceReset if that happens).

[Mrz-creator]

The serial port chip on the old version of Sonoff Dongle-E is CH910, not CP210. Can this dtr/rts also be supported?

[Nerivec]

I have yet to find a way to add "generic" support for all adapters.
GPIO libraries all seem to be Linux-only, and many are targeting specific boards on top of it.
Since most adapters should work with regular triggering from stack (or button, or some other specific method, as last resort), this is not a priority.