New creates a new templates container scanning a directory.

NewFromTemplates creates a new templates container using a `template.Template` object.

NewWithWatcher creates a new templates container scanning a directory and watch the directory filesystem changes to apply them to the loaded templates.

Container represents a set of templates that can be render.

Data contains the data used to populate the template variables, it has Props that can be of any type and HTML that only can be `template.HTML` types.