refactor(console): refactor language options and refine documentation l10n url logic

[charIeszhao]

Summary

Non-Chinese language will fall back to English on clicking the "Docs" link in admin console.

Testing

• [x] Tested only Chinese language will end up appending zh-CN in the docusaurus URL, others remain using English.

[linear[bot]]

LOG-3852 [Docs] No fallback docs link on unsupported language

When we have a new language in AC, clicking the Docs menu will end up in a "not found" page in logto docs.

https://github.com/logto-io/docs/issues/215

[github-actions[bot]]

COMPARE TO master

Total Size Diff :chart_with_upwards_trend: +558 Bytes

Diff by File

Name	Diff
packages/console/src/components/AppContent/components/Sidebar/hook.tsx	:chart_with_upwards_trend: +138 Bytes
packages/console/src/hooks/use-documentation-url.ts	:chart_with_upwards_trend: +652 Bytes
packages/console/src/hooks/use-language.ts	:chart_with_upwards_trend: +302 Bytes
packages/console/src/pages/GetStarted/hook.ts	:chart_with_upwards_trend: +172 Bytes
packages/console/src/pages/Settings/index.tsx	:chart_with_upwards_trend: +70 Bytes
packages/phrases-ui/src/types.ts	:chart_with_upwards_trend: +224 Bytes
packages/phrases/src/types.ts	:chart_with_upwards_trend: +224 Bytes