Override PaperMod author partial to handle map format

PaperMod's author.html expects params.author to be a string, but
our config uses a map with name and email (needed for RSS). Add a
reflect.IsMap check to extract .name for display, matching how the
updated PaperMod RSS template already handles the map format.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

layouts/partials/author.html

@@ -0,0 +1,10 @@
+{{- if or .Params.author site.Params.author }}
+{{- $author := (.Params.author | default site.Params.author) }}
+{{- if reflect.IsMap $author }}
+{{- $author.name }}
+{{- else if (or (eq (printf "%T" $author) "[]string") (eq (printf "%T" $author) "[]interface {}")) }}
+{{- (delimit $author ", " ) }}
+{{- else }}
+{{- $author }}
+{{- end }}
+{{- end -}}