refactor: replace `pydantic_core.from_json` by `json.loads` (#1912) #215

Job	Run time
checks / pre-commit	37s
checks / readme-snippets	10s
checks / test (3.11, locked, windows-latest)	2m 23s
checks / test (3.11, lowest-direct, windows-latest)	2m 43s
checks / test (3.12, lowest-direct, ubuntu-latest)	52s
checks / test (3.10, locked, ubuntu-latest)	46s
checks / test (3.10, lowest-direct, windows-latest)	2m 19s
checks / test (3.12, lowest-direct, windows-latest)	3m 24s
checks / test (3.11, lowest-direct, ubuntu-latest)	45s
checks / test (3.10, lowest-direct, ubuntu-latest)	45s
checks / test (3.12, locked, ubuntu-latest)	55s
checks / test (3.10, locked, windows-latest)	2m 40s
checks / test (3.13, lowest-direct, ubuntu-latest)	42s
checks / test (3.11, locked, ubuntu-latest)	47s
checks / test (3.13, lowest-direct, windows-latest)	2m 23s
checks / test (3.14, locked, ubuntu-latest)	2m 15s
checks / test (3.13, locked, windows-latest)	2m 29s
checks / test (3.14, lowest-direct, windows-latest)	2m 47s
checks / test (3.12, locked, windows-latest)	3m 27s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 9s
checks / test (3.13, locked, ubuntu-latest)	43s
checks / test (3.14, locked, windows-latest)	3m 6s
all-green	5s
	38m 12s

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