Update upstream merge scripts to use a generic x-opencode- → x-kilo- regex
that catches all current and future headers automatically. Apply the same
replacement to all source files so the codebase is ready for the next
upstream merge.
* feat: changelog generation
* refactor: rename all ENV variables to KILO prefix
* refactor: publish rework
* refactor: publish rework
* refactor: unify git commiter action
* refactor: add all kilobots to the team
Catriel Müller