fix: revert README to v1.x documentation on main #410

Job	Run time
checks / readme-snippets	11s
checks / pre-commit	37s
checks / test (3.10, locked, windows-latest)	2m 32s
checks / test (3.11, lowest-direct, ubuntu-latest)	51s
checks / test (3.10, locked, ubuntu-latest)	49s
checks / test (3.10, lowest-direct, windows-latest)	2m 34s
checks / test (3.10, lowest-direct, ubuntu-latest)	58s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 19s
checks / test (3.11, locked, windows-latest)	2m 48s
checks / test (3.12, locked, windows-latest)	3m 53s
checks / test (3.12, lowest-direct, ubuntu-latest)	58s
checks / test (3.13, lowest-direct, ubuntu-latest)	54s
checks / test (3.14, lowest-direct, windows-latest)	2m 21s
checks / test (3.13, locked, ubuntu-latest)	44s
checks / test (3.13, locked, windows-latest)	2m 24s
checks / test (3.13, lowest-direct, windows-latest)	2m 50s
checks / test (3.11, locked, ubuntu-latest)	49s
checks / test (3.14, locked, windows-latest)	3m 28s
checks / test (3.12, lowest-direct, windows-latest)	3m 34s
checks / test (3.11, lowest-direct, windows-latest)	2m 35s
checks / test (3.12, locked, ubuntu-latest)	55s
checks / test (3.14, locked, ubuntu-latest)	2m 14s
all-green	4s
	40m 22s

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