chore: add CODEOWNERS #168

Job	Run time
Detect code changes	5s
Python Linting (ruff)	11s
Windows core-only	3m 28s
Diagram Render Smoke	58s
Python Type Checking (mypy)	15s
Windows diagram-dot	4m 18s
Linux yaml	1m 36s
Linux server-enabled	1h 5m 28s
version-sync / version-sync	7s
Strict dimensional validation	1m 16s
Linux json	1m 25s
Linux core-only	1m 26s
Linux diagram-dot	1m 33s
ok	4s
	1h 22m 10s

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