Add reactive folder, as well as a quick introduction to the reactive paradigm.
This introduction has been completely refactored and lightened since the last iteration of this pull request, effectively saving most of the previously mentionned notions for future dedicated sheets.
Add
reactivefolder, as well as a quick introduction to the reactive paradigm. This introduction has been completely refactored and lightened since the last iteration of this pull request, effectively saving most of the previously mentionned notions for future dedicated sheets.