fix: giscus theme and language display issues (#95)

* chore: minor update giscus template

* fix: theme toggle should select all

* chore: example configs for giscus

* fix: language code in giscus

exampleSite/hugo.yaml

@@ -26,6 +26,7 @@ languages:
     title: "Hextra テーマ"
   zh-cn:
     languageName: 简体中文
+    languageCode: zh-CN
     weight: 3
     title: Hextra
 
@@ -122,3 +123,20 @@ params:
   editURL:
     enable: true
     base: "https://github.com/imfing/hextra/edit/main/exampleSite/content"
+
+  comment:
+    enable: false
+    type: giscus
+
+    # https://giscus.app/
+    giscus:
+      repo: "imfing/hextra"
+      repoId: "R_kgDOJ9fJag"
+      category: "General"
+      categoryId: "DIC_kwDOJ9fJas4CY7gW"
+      # mapping: "pathname"
+      # strict: 0
+      # reactionsEnabled: 1
+      # emitMetadata: 0
+      # inputPosition: "top"
+      # lang: "en"