Search plugin, provide configuration for path whitelist/blacklist

[DanielYWoo]

Feature request

What problem does this feature solve?

I have hundreds of documents in the navbar in a hierarchy. I want to search only a few paths instead of all documents.

What does the proposed API look like?

provide configuration of whitelist and blacklist for the search plugin, either path prefix or regex.

How should this be implemented in your opinion?

Not sure.

Are you willing to work on this yourself?

Yes, if somebody can help me. I cannot find documents about the search plugin.

[sy-records]

This allows you to search only these two files.

 search: [
 '/custom-navbar', // => /custom-navbar.md
 '/zh-cn/', // => /zh-cn/README.md
 ],