Github integration / plugin importation

[nathmo]

this is an idea : allow to import a blueprint from github.

instead of copy pasting the string i could link a reference to a github file so that i dont have to reupload each little improvment.
it might also allow to make the collective improvment easier as every little improvment could me merged on one main reference blueprint instead of having each flavour of the same blueprint floating around.

https://github.com/nathmo/FactorioContainerSystemPrint

here is my repo with some blueprint of mine as an example. it would be nice that i could paste the URL of this repo / individual txt file and if the github one get updated, this one does too.

(I wonder to what extend a github action could to the render of a factorio blueprint. if it's possible it might be easier to just provide a template repository with the action set and an empty TXT file to fork and the resulting image would be added to the github (as an artefact)