tags should be placed in respective static content area

[tesar-tech]

Currently when you use blog with tags it will produce blog and tags folder inside the output.

But in case of having multiple static content areas (using .AddBlazorStaticContentService) and allowing tags on both, the tags folder gets mixed and there could be potential overrides.

My idea is to have the tags folder inside the blog folder, thus having the tags url under blog/tags...

Small issue that didn't really produce any harm so far, but better be prepare and fix it in early stages.

Ideas?