fix: revert README.md to v1 documentation #663

Job	Run time
checks / readme-snippets	12s
checks / pre-commit	51s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 19s
checks / test (3.13, locked, windows-latest)	2m 42s
checks / test (3.11, locked, ubuntu-latest)	53s
checks / test (3.13, lowest-direct, windows-latest)	2m 37s
checks / test (3.12, locked, windows-latest)	3m 29s
checks / test (3.11, lowest-direct, windows-latest)	2m 30s
checks / test (3.14, locked, windows-latest)	7m 38s
checks / test (3.14, lowest-direct, windows-latest)	2m 37s
checks / test (3.11, lowest-direct, ubuntu-latest)	53s
checks / test (3.10, locked, windows-latest)	2m 47s
checks / test (3.11, locked, windows-latest)	2m 31s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 1s
checks / test (3.10, locked, ubuntu-latest)	53s
checks / test (3.14, locked, ubuntu-latest)	2m 29s
checks / test (3.12, lowest-direct, windows-latest)	3m 47s
checks / test (3.10, lowest-direct, ubuntu-latest)	54s
checks / test (3.12, locked, ubuntu-latest)	1m 0s
checks / test (3.13, lowest-direct, ubuntu-latest)	50s
checks / test (3.10, lowest-direct, windows-latest)	2m 45s
checks / test (3.13, locked, ubuntu-latest)	47s
all-green	5s
	45m 30s

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