Use get_bloginfo in the REST API index

[TimothyBlynJacobs]

The REST API provides data in the site "index" when making a request to https://example.org/wp-json. This describes the site and the APIs available. In particular it returns the name of the website, and the tagline. These values are retrieved using get_option directly instead of get_bloginfo.

Because this data would be used presentationally, it seems like it'd be more useful if it returned the "presentation" version of these strings.

As far as I could tell, the index has more or less worked the same since the GSOC version of the REST API, so I wasn't able to find any description of why it was built that way.

I opened this because of ​a Gutenberg PR which would display the site title.

[TimothyBlynJacobs]

Thanks for the patch @dkarfa! To clarify, I didn't make this super clear, I meant using get_bloginfo() with the $filter parameter set to display so the filters are applied. I'm not 100% sure its a good idea yet :)

[dkarfa]

Hi, @TimothyBlynJacobs,
I have updated the patch.
Thank you