Add version v28 (#564)

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Reviewed-on: https://gitea.com/gitea/docs/pulls/564
Reviewed-by: bircni <[email protected]>
Co-authored-by: Lunny Xiao <[email protected]>

i18n/zh-tw/docusaurus-plugin-content-docs/version-28/usage/user-setting/_category_.json

@@ -0,0 +1,9 @@
+{
+  "label": "User Setting",
+  "position": 200,
+  "link": {
+    "type": "generated-index",
+    "slug": "/usage/user-setting",
+    "description": "Configuring user preferences and settings"
+  }
+}