chore: Add the kubernetes architecture outline to the CONTRIBUTING.md (#6410)

* chore: Add the kubernetes architecture outline to the CONTRIBUTING.md

Signed-off-by: MOZGIII <mike-n@narod.ru>

* Re-add the lost line break

Signed-off-by: MOZGIII <mike-n@narod.ru>

* Add to the ToS

Signed-off-by: MOZGIII <mike-n@narod.ru>

* Add the section on where to find things

Signed-off-by: MOZGIII <mike-n@narod.ru>