fix: add title to api reference page

[IceHe]

Summary

Add the title "API" to API Reference page

• The full title of API Reference page should API | Logto Docs (i.e. page title + ' | ' + website title)

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Related problem:

After adding the title to the API Reference page, failed to pass tsc -p tsconfig.json.

Resolved it by adding "types": ["@docusaurus/theme-classic"] in tsconfig.ts.

Thanks for the help from @demonzoo

Testing

Locally tested.

[linear[bot]]

LOG-3847 API Reference title in the browser tab should be "API | Logto Docs"

Troubleshooting: After adding the title to the API Reference page, failed to pass tsc -p tsconfig.json

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With the help from @charles , resolve it using types in tsconfig.ts

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Inspired by https://github.com/facebook/docusaurus/issues/6295

Reference: tsconfig#types