x/pkgsite: builtin should be ranked higher in search

[komuw]

What is the URL of the page with the issue?

https://pkg.go.dev/search?q=builtin

What is your user agent?

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.59 Safari/537.36

screenshot

What did you do?

Visited the page.

What did you expect to see?

The stdlib builtin package listed as the first result; https://pkg.go.dev/builtin/?tab=doc

What did you see instead?

A list of packages, with the stdlib one not been one of them

[mvdan]

Perhaps this is because builtin is not a normal package, it's not a package you can import. So if they have any "sort by" parameters like "number of packages that import this package", then that should always be 0 for builtin.

[mvdan]

(To clarify, I agree this is likely a bug; I'm just guessing what the cause might be)

[toothrot]

/cc @julieqiu @jba @jamalc