Remove `trajan` as core dependency #481

Job	Run time
py3.13 \| macos \| unit tests	10m 22s
mypy	4m 10s
py3.13 \| ubuntu \| unit tests	13m 32s
py3.13 \| macos \| integration tests	11m 58s
py3.13 \| windows \| unit tests	20m 4s
py3.13 \| ubuntu \| integration tests	17m 59s
py3.10 \| ubuntu \| unit tests	13m 29s
py3.13 \| windows \| integration tests	30m 19s
py3.11 \| ubuntu \| unit tests	13m 31s
py3.10 \| ubuntu \| integration tests	19m 14s
py3.12 \| ubuntu \| unit tests	14m 25s
merge-test-artifacts	2s
	2h 49m 5s

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