[Docs]: Integrate tkn-results docs with main docs

[adambkaplan]

Feature request

Integrate the tkn-results docs with our main documentation, with the goal of having this appear on https://tekton.dev/docs/results/.

Use case

• Help developers/cluster admins interact with Results data.
• Provide reference documentation that can be synced with releases.

/kind documentation

[tekton-robot]

Issues go stale after 90d of inactivity. Mark the issue as fresh with /remove-lifecycle stale with a justification. Stale issues rot after an additional 30d of inactivity and eventually close. If this issue is safe to close now please do so with /close with a justification. If this issue should be exempted, mark the issue as frozen with /lifecycle frozen with a justification.

/lifecycle stale

Send feedback to tektoncd/plumbing.

[tekton-robot]

Stale issues rot after 30d of inactivity. Mark the issue as fresh with /remove-lifecycle rotten with a justification. Rotten issues close after an additional 30d of inactivity. If this issue is safe to close now please do so with /close with a justification. If this issue should be exempted, mark the issue as frozen with /lifecycle frozen with a justification.

/lifecycle rotten

Send feedback to tektoncd/plumbing.

[adambkaplan]

/lifecycle frozen