fix: Hugo language related deprecation (v0.158.0+) (#1334)

* language related deprecation fix

Reference: https://github.com/gohugoio/hugo/releases/tag/v0.158.0
.Site.LanguageCode -> .Site.Language.Locale
.Language.LanguageDirection -> .Language.Direction
.Language.LanguageCode -> .Language.Locale

Also, in the configuration hugo.toml, the user should change `languageCode` to `locale`.

* Update languageCode to locale in configuration

* fix(languages): update languageName to label in languages.toml

* .Language.LanguageName -> .Language.Label

* .Language.Lang -> .Language.Name

---------

Co-authored-by: Jimmy Cai <jimmy@cai.im>

layouts/_partials/article/components/details.html

@@ -58,7 +58,7 @@
             <div class="inline-meta">
                 {{ partial "helper/icon" "language" }}
                 {{ range $Page.Translations }}
-                    <a href="{{ .RelPermalink }}" class="link">{{ .Language.LanguageName }}</a>
+                    <a href="{{ .RelPermalink }}" class="link">{{ .Language.Label }}</a>
                 {{ end }}
             </div>
         {{ end }}