Rebuild the docs around tested examples; shrink README.v2.md to a pitch #3025

Job	Run time
checks / pre-commit	48s
checks / docs	35s
checks / readme-snippets	11s
checks / test (3.10, locked, ubuntu-latest)	1m 10s
checks / test (3.10, lowest-direct, windows-latest)	1m 40s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 9s
checks / test (3.11, lowest-direct, windows-latest)	1m 32s
checks / test (3.10, locked, windows-latest)	1m 38s
checks / test (3.12, lowest-direct, windows-latest)	1m 34s
checks / test (3.11, locked, ubuntu-latest)	1m 3s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 12s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 8s
checks / test (3.11, locked, windows-latest)	1m 41s
checks / test (3.13, locked, ubuntu-latest)	58s
checks / test (3.12, locked, windows-latest)	1m 38s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 5s
checks / test (3.13, lowest-direct, windows-latest)	1m 36s
checks / test (3.14, locked, ubuntu-latest)	2m 13s
checks / test (3.14, lowest-direct, windows-latest)	1m 38s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 0s
checks / test (3.14, locked, windows-latest)	2m 13s
checks / test (3.13, locked, windows-latest)	1m 45s
checks / test (3.12, locked, ubuntu-latest)	1m 6s
all-green	3s
	30m 36s

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