docs: reframe README opener around the human+agent audience #97

Job	Run time
Type Check	16s
Pre-commit	1m 15s
Architecture (import-linter)	13s
File length	4s
Unit tests	21s
Coverage	23s
Version bump check	5s
Lint & Format	10s
Action pinning audit	8s
src/ README audit	5s
Aspirational ticket cite	8s
Frontend Build	14s
Frontend Quality	18s
Branch-protection contexts sync	10s
Tests required	6s
Commit-type sync	9s
	4m 5s

Provide feedback