add theme hugo-et-hd

[foxihd]

Add theme hugo-et-hd, here is the example site.

[netlify]

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[foxihd]

The error remain the same as my pull request in #401.
I don't find force pull helps in previous attempt.

here's the error log line:

12:49:43 PM: Error: error building site: render: failed to render pages: render of "page" failed: "/opt/build/cache/hugo_cache/modules/filecache/modules/pkg/mod/github.com/gohugoio/hugo!themes!site@v0.0.0-20240125095428-964006cadb41/layouts/_default/single.html:22:13": execute of template failed: template: _default/single.html:22:13: executing "main" at <partial "theme-details" .>: error calling partial: "/opt/build/cache/hugo_cache/modules/filecache/modules/pkg/mod/github.com/gohugoio/hugo!themes!site@v0.0.0-20240125095428-964006cadb41/layouts/partials/theme-details.html:35:13": execute of template failed: template: partials/theme-details.html:35:13: executing "partials/theme-details.html" at <.homepage>: can"t evaluate field homepage in type interface {}