Added domree option in order to be able to work with this on shadow dom

[Agog-io]

These are the changes I did to make this work on a shadow dom , as i mentioned on #168. I made more tailoring changes for the project I used this in and this is not tested outside that environment

[Agog-io]

This is also tested only with the inline: true option , looking at my implementation.

[Agog-io]

This is exactly my usecase

Coloris({
el: el,//element in shadow dom
parent: parent, ,//element in shadow dom
inline: true,
domTree: shadowDom, // ShadowRoot object
alpha: true,
defaultColor: color,
})

[mdbassit]

I can not accept this PR as it will break things. But I will try and use it as a reference to properly support shadowDOM. Thanks for your help!

[Agog-io]

Ofcourse and thats expected, really i just did it asap to integrate it into my project 🫡. Let me know if u need any help or if you encounter any roadblocks , maybe I can point you in the right direction.

Good luck!