feat: add docs_version configuration for RTD publications #49

Job	Run time
quality	32s
tests (ubuntu-latest, 3.9, highest)	21s
tests (ubuntu-latest, 3.10, highest)	21s
tests (ubuntu-latest, 3.9, lowest-direct)	21s
tests (ubuntu-latest, 3.11, highest)	25s
tests (ubuntu-latest, 3.10, lowest-direct)	22s
tests (ubuntu-latest, 3.13, highest)	19s
tests (ubuntu-latest, 3.12, lowest-direct)	28s
tests (ubuntu-latest, 3.12, highest)	30s
tests (ubuntu-latest, 3.14, lowest-direct)	28s
tests (windows-latest, 3.12, highest)	1m 5s
tests (ubuntu-latest, 3.13, lowest-direct)	25s
tests (macos-latest, 3.12, highest)	27s
tests (macos-latest, 3.11, highest)	30s
tests (ubuntu-latest, 3.11, lowest-direct)	23s
tests (macos-latest, 3.14, highest)	1m 4s
tests (macos-latest, 3.13, highest)	36s
tests (macos-latest, 3.10, highest)	59s
tests (ubuntu-latest, 3.14, highest)	34s
tests (windows-latest, 3.10, highest)	46s
tests (windows-latest, 3.13, highest)	1m 2s
tests (windows-latest, 3.11, highest)	57s
tests (windows-latest, 3.14, highest)	2m 30s
tests (windows-latest, 3.9, highest)	1m 58s
tests (macos-latest, 3.9, highest)	45s
	18m 8s

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