move `tkn-results` to the same tree as the results package

[avinal]

Current State

tkn-results is currently in its module separate from the main tree

Expected

moving tkn-results to the same tree will make it easier to publish releases as well as reduce the redundant packages while vendoring

[avinal]

I can take on this task if the issue is approved by the community.

[adambkaplan]

:+1: from me. Having tkn-results as a separate go module has proved cumbersome in practice.

[avinal]

/assign