go/types: documentation needs to be updated

[griesemer]

The documentation on go/types needs to be updated for generics: https://github.com/golang/example/tree/master/gotypes

At the very least it should point out what's not yet documented with respect to generics.

cc: @findleyr

[findleyr]

The guide that I'm working on (starting with https://go-review.googlesource.com/c/tools/+/377834) is based on x/example/gotypes. I plan to both have the separate guide for 1.18, and integrate aspects of this into x/example/gotypes proper.

[gopherbot]

Change https://go.dev/cl/389656 mentions this issue: gotypes: add a link to the 1.18 API guide, and fix links

[ianlancetaylor]

Are we going to do something here for 1.19? Thanks.

[findleyr]

This documentation is in x/example; no need to associate with 1.19.