feat(i18n): integrate internationalization support into dashboard

- Added i18next and react-i18next for localization support.
- Created i18n configuration in `src/i18n.ts` and set up language detection.
- Introduced `I18nProvider` to manage i18n context and resource updates.
- Added localization files for English and Chinese (Simplified) with necessary translations.
- Updated `ErrorElement` component to utilize translations for error messages.
- Enhanced dashboard documentation with i18n usage guidelines.

Signed-off-by: Innei <tukon479@gmail.com>

locales/dashboard/en.json

@@ -0,0 +1,13 @@
+{
+  "app.name": "Afilmory Dashboard",
+  "error.boundary.description": "We encountered an unexpected error",
+  "error.boundary.go-back": "Go Back",
+  "error.boundary.help": "If this problem persists, please report it to our team.",
+  "error.boundary.reload": "Reload Application",
+  "error.boundary.report": "Report on GitHub",
+  "error.boundary.title": "Something went wrong",
+  "nav.library": "Library",
+  "nav.overview": "Overview",
+  "nav.settings": "Settings",
+  "nav.users": "Users"
+}

locales/dashboard/zh-CN.json

@@ -0,0 +1,13 @@
+{
+  "app.name": "Afilmory 管理后台",
+  "error.boundary.description": "我们遇到了一个意料之外的错误",
+  "error.boundary.go-back": "返回上一页",
+  "error.boundary.help": "如果问题持续出现，请反馈给我们的团队。",
+  "error.boundary.reload": "重新加载",
+  "error.boundary.report": "在 GitHub 上反馈",
+  "error.boundary.title": "系统出现问题",
+  "nav.library": "图库",
+  "nav.overview": "概览",
+  "nav.settings": "设置",
+  "nav.users": "成员"
+}