vs-code: Build tag json files into a single html extension json file

[KevinJump]

For a vs-code version see branch : https://github.com/KevinJump/UmbSense/tree/vs-code

the extension uses json to define the html extension data, we are building a json file for each tag so we can manage it, but we should find a way to merge these json files on extension build so people only get one and so we don't have to keep updating the packages.json file.