RFR: JDK-8248863: Add search landing page to API documentation

[Hannes Wallnöfer]

On Wed, 13 Apr 2022 21:27:30 GMT, liach <duke at openjdk.java.net> wrote:

> User remark:
> 
>     1. Seems the result list will automatically scroll down when the mouse hovers over, which feels weird.

I think what you're referring to is a behavior of the jQuery autocomplete component we are using. It was not modified in this PR, however. 
 
>     2. When an arbitrary string is typed in and enter is pressed, it navigates to the best match, even though it may not be an accurate match to the class simple name or method name. Should we consider navigating to the results page first in that case?

I don't understand that. Can you provide an example please?

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PR: https://git.openjdk.java.net/jdk/pull/8226