docs: add development workflow instructions to AGENTS.md #79

Job	Run time
test (Python 3.9)	28s
security (pip-audit)	21s
typecheck (mypy --strict)	23s
lint (ruff)	16s
test (Python 3.13)	28s
duplication	12s
test (Python 3.12)	22s
test (Python 3.11)	19s
Hawk daemon contract snapshot	6s
test (Python 3.10)	23s
build (sdist + wheel)	17s
	3m 35s

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