[v1.x] Move the v1.x docs to /v1/ and mark v1.x as the maintenance line #4334

Job	Run time
checks / doc-snippets	11s
checks / test (3.11, lowest-direct, windows-latest)	2m 36s
checks / test (3.10, lowest-direct, ubuntu-latest)	46s
checks / test (3.11, lowest-direct, ubuntu-latest)	49s
checks / pre-commit	34s
checks / test (3.10, highest, ubuntu-latest)	49s
checks / docs	20s
checks / test (3.13, highest, windows-latest)	2m 40s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 10s
checks / test (3.11, highest, ubuntu-latest)	45s
checks / test (3.12, highest, windows-latest)	3m 0s
checks / test (3.12, highest, ubuntu-latest)	51s
checks / test (3.14, highest, ubuntu-latest)	1m 12s
checks / test (3.13, lowest-direct, windows-latest)	2m 22s
checks / test (3.10, lowest-direct, windows-latest)	2m 16s
checks / test (3.13, lowest-direct, ubuntu-latest)	51s
checks / test (3.14, lowest-direct, windows-latest)	1m 54s
checks / test (3.12, lowest-direct, windows-latest)	3m 14s
checks / test (3.12, lowest-direct, ubuntu-latest)	49s
checks / test (3.10, highest, windows-latest)	2m 16s
checks / test (3.13, highest, ubuntu-latest)	47s
checks / test (3.11, highest, windows-latest)	2m 21s
checks / test (3.14, highest, windows-latest)	2m 6s
all-green	7s
	34m 46s

Provide feedback