Unable to inject tag name when using custom tagTitle

[jeff-horton-ho-sas]

The tags feature page documentation suggests that the default for the tag page is Posts tagged ‘{{ tag }}’, but if I use tags: {tagTitle: "Pages tagged ‘{{ tag }}’"} in the plugin config, the page title ends up being Pages tagged ‘{{ tag }}’.

Looking at the implementation, this is because the default is using a template string, but options.tagTitle from options can only be a static string with this implementation.

Possible solutions:

1. Allow passing functions into tagTitle:

   title: typeof options?.tagTitle === 'function' 
       ? options?.tagTitle 
       : (data) => options?.tagTitle || `Posts tagged ‘${data.tag}’`

   and then the tagTitle could be specified as:

   tagTitle: (data) => `Pages tagged ‘${ data.tag }’`

2. Use nunjucks to render the title:

   title: (data) => nunjucks.renderString(options?.tagTitle || "Posts tagged ‘{{ tag }}’", data)

   Which would then work as currently documented.

Happy to submit a PR for either option, please let me know which is preferred.