feat(client): store InitializeResult as initialize_result (#2300) #1528

Job	Run time
checks / readme-snippets	11s
checks / pre-commit	40s
checks / test (3.10, lowest-direct, ubuntu-latest)	55s
checks / test (3.11, lowest-direct, windows-latest)	2m 17s
checks / test (3.12, locked, windows-latest)	3m 6s
checks / test (3.10, locked, windows-latest)	2m 5s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 0s
checks / test (3.10, locked, ubuntu-latest)	55s
checks / test (3.11, locked, ubuntu-latest)	47s
checks / test (3.12, lowest-direct, windows-latest)	3m 24s
checks / test (3.11, locked, windows-latest)	2m 41s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 10s
checks / test (3.13, locked, windows-latest)	1m 58s
checks / test (3.10, lowest-direct, windows-latest)	2m 47s
checks / test (3.14, lowest-direct, windows-latest)	2m 37s
checks / test (3.13, lowest-direct, ubuntu-latest)	52s
checks / test (3.13, locked, ubuntu-latest)	55s
checks / test (3.14, locked, windows-latest)	2m 57s
checks / test (3.13, lowest-direct, windows-latest)	2m 45s
checks / test (3.12, locked, ubuntu-latest)	55s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 0s
checks / test (3.14, locked, ubuntu-latest)	2m 15s
all-green	3s
	38m 15s

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