refactor: replace `AnyFunction` by proper types (#1916) #235

Job	Run time
checks / readme-snippets	10s
checks / pre-commit	32s
checks / test (3.11, locked, windows-latest)	2m 22s
checks / test (3.10, lowest-direct, ubuntu-latest)	45s
checks / test (3.12, lowest-direct, ubuntu-latest)	53s
checks / test (3.11, lowest-direct, windows-latest)	2m 27s
checks / test (3.11, locked, ubuntu-latest)	51s
checks / test (3.10, locked, windows-latest)	2m 20s
checks / test (3.10, locked, ubuntu-latest)	45s
checks / test (3.10, lowest-direct, windows-latest)	2m 47s
checks / test (3.13, lowest-direct, windows-latest)	2m 13s
checks / test (3.11, lowest-direct, ubuntu-latest)	45s
checks / test (3.12, locked, windows-latest)	3m 17s
checks / test (3.13, locked, windows-latest)	2m 22s
checks / test (3.12, lowest-direct, windows-latest)	3m 31s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 14s
checks / test (3.14, locked, windows-latest)	3m 25s
checks / test (3.12, locked, ubuntu-latest)	52s
checks / test (3.13, locked, ubuntu-latest)	45s
checks / test (3.14, locked, ubuntu-latest)	2m 7s
checks / test (3.14, lowest-direct, windows-latest)	2m 18s
checks / test (3.13, lowest-direct, ubuntu-latest)	44s
all-green	2s
	37m 27s

Provide feedback