* remove 'test' project
* dynamic template list generation
- uses a single fs.Embed to contain all templates
- walks and rebuilds the list of TemplateData using the cached data
- pulls the `description` out of the required `template.json` file in
the template directory
* [v3] template handling update
- move "common" template files to a _common directory
- update generator to render from _common/* first
- render selected template last to overwrite anything provided by
_common if needed
- remove duplicate files from all templates that do not change
* cleanup template project directory after test
* add linux to _common/Taskfile.yaml
* noop: whitespace cleanup _common/Taskfile.yaml
