Completely drop `RootModel` from `types` module #204

Job	Run time
checks / pre-commit	32s
checks / readme-snippets	11s
checks / test (3.11, lowest-direct, ubuntu-latest)	46s
checks / test (3.10, lowest-direct, windows-latest)	2m 22s
checks / test (3.10, locked, ubuntu-latest)	48s
checks / test (3.11, lowest-direct, windows-latest)	2m 35s
checks / test (3.10, lowest-direct, ubuntu-latest)	43s
checks / test (3.11, locked, windows-latest)	2m 24s
checks / test (3.10, locked, windows-latest)	2m 19s
checks / test (3.11, locked, ubuntu-latest)	44s
checks / test (3.12, locked, windows-latest)	3m 14s
checks / test (3.13, lowest-direct, windows-latest)	2m 35s
checks / test (3.12, lowest-direct, ubuntu-latest)	51s
checks / test (3.14, locked, ubuntu-latest)	2m 15s
checks / test (3.13, lowest-direct, ubuntu-latest)	42s
checks / test (3.13, locked, windows-latest)	2m 25s
checks / test (3.12, lowest-direct, windows-latest)	3m 19s
checks / test (3.14, locked, windows-latest)	2m 59s
checks / test (3.14, lowest-direct, windows-latest)	2m 24s
checks / test (3.13, locked, ubuntu-latest)	44s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 14s
checks / test (3.12, locked, ubuntu-latest)	55s
all-green	2s
	37m 3s

Provide feedback