wiki: redirect everything to go.dev/wiki For #61940.
url updates to go.dev / pkg.go.dev
fix godoc.org / pkg.go.dev links
Updated Go2ErrorValuesFeedback (markdown)
add section Draft Implementation
add Further Background section and Ben Johnson article
Add feedback.
Add feedback about conflict between errors.Formatter and fmt.Formatter interfaces
What happens with errors.New, and a small use case
clarify that the gists I posted are distinct
Add reference to the error value approach used in ev3go/ev3dev.