Blightning

Results 4 issues of Blightning

Inputs on the HttpRequestNode are not being used. This fix first tries to get an url from an input and failing that falls back to the internal url property.

Hi @ryankurte , I implemented some new features in my [fork](https://github.com/VISCON-GmbH/rust-streamdeck/tree/sd_plus_support) - Input events - Streamdeck Plus Support (including Dials and touchscreen) - probe function to detect connected streamdecks ##...

Basic SD Plus Support (buttons only) as discussed in #33

Implemented input events as discussed in #33. Tested functionality with StreamDeck Plus and Mini.