feat(client): store full InitializeResult as server_params #1487

Job	Run time
checks / readme-snippets	12s
checks / pre-commit	30s
checks / test (3.10, lowest-direct, windows-latest)	2m 41s
checks / test (3.10, lowest-direct, ubuntu-latest)	56s
checks / test (3.10, locked, windows-latest)	2m 25s
checks / test (3.10, locked, ubuntu-latest)	53s
checks / test (3.11, locked, windows-latest)	2m 23s
checks / test (3.11, locked, ubuntu-latest)	49s
checks / test (3.11, lowest-direct, windows-latest)	2m 55s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 6s
checks / test (3.12, locked, windows-latest)	3m 20s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 18s
checks / test (3.13, lowest-direct, windows-latest)	3m 23s
checks / test (3.11, lowest-direct, ubuntu-latest)	57s
checks / test (3.14, locked, windows-latest)	3m 40s
checks / test (3.12, locked, ubuntu-latest)	59s
checks / test (3.13, locked, windows-latest)	2m 29s
checks / test (3.14, locked, ubuntu-latest)	2m 20s
checks / test (3.12, lowest-direct, windows-latest)	3m 49s
checks / test (3.14, lowest-direct, windows-latest)	2m 28s
checks / test (3.13, locked, ubuntu-latest)	46s
checks / test (3.13, lowest-direct, ubuntu-latest)	56s
all-green	3s
	41m 18s

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