Support creating hardlinks #86

Job	Run time
Type check	30s
Format and lint	14s
Test: Python 3.7 on ubuntu-20.04	27s
Test: Python 3.8 on ubuntu-20.04	19s
Test: Python 3.9 on ubuntu-20.04	19s
Test: Python 3.10 on ubuntu-20.04	20s
Test: Python 3.11 on ubuntu-20.04	22s
Test: Python 3.12 on ubuntu-20.04	18s
Test: Python 3.13 on ubuntu-20.04	27s
Test: Python pypy-3.9 on ubuntu-20.04	54s
Test: Python pypy-3.10 on ubuntu-20.04	54s
Test: Python 3.8 on macos-latest	1m 6s
Test: Python 3.9 on macos-latest	46s
Test: Python 3.10 on macos-latest	39s
Test: Python 3.11 on macos-latest	26s
Test: Python 3.12 on macos-latest	26s
Test: Python 3.13 on macos-latest	42s
Test: Python pypy-3.9 on macos-latest	53s
Test: Python pypy-3.10 on macos-latest	54s
Test: Python 3.8 on windows-latest	1m 33s
Test: Python 3.9 on windows-latest	1m 15s
Test: Python 3.10 on windows-latest	1m 8s
Test: Python 3.11 on windows-latest	1m 9s
Test: Python 3.12 on windows-latest	59s
Test: Python 3.13 on windows-latest	3m 2s
	20m 2s

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