New feature for Tilde.news

Many users wanted the ability to be able to add new tags for the link agregator tilde.news. I saw that is was moderatley simple to do, with no other impacts. I took the lead, and added that feature, and at the request of the community, left if as hidden feature.

Project link: https://tildegit.org/tildeverse/tilde.news/commit/b09623295e78d44008279dd3fee29bcf970009bc

Nifty tech tag lists fromĀ Wouter Beeftink