docs: reframe README opener around the human+agent audience (#99) #117

Job	Run time
Lint & Format	11s
Type Check	20s
Architecture (import-linter)	12s
Coverage	19s
File length	5s
Unit tests	20s
Commit-type sync	8s
src/ README audit	7s
Action pinning audit	7s
Frontend Quality	16s
Frontend Build	15s
Branch-protection contexts sync	11s
Pre-commit	1m 7s
Aspirational ticket cite	6s
Version bump check	0s
Tests required	0s
	3m 44s

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