Add experimental Server Cards support (SEP-2127) #3145

Job	Run time
checks / docs	43s
checks / pre-commit	41s
checks / readme-snippets	14s
checks / test (3.14, lowest-direct, ubuntu-latest)	51s
checks / test (3.11, lowest-direct, ubuntu-latest)	57s
checks / test (3.10, locked, windows-latest)	1m 31s
checks / test (3.10, lowest-direct, windows-latest)	1m 34s
checks / test (3.10, lowest-direct, ubuntu-latest)	56s
checks / test (3.13, locked, windows-latest)	1m 37s
checks / test (3.12, locked, windows-latest)	1m 26s
checks / test (3.14, lowest-direct, windows-latest)	1m 31s
checks / test (3.12, lowest-direct, windows-latest)	1m 36s
checks / test (3.11, locked, windows-latest)	1m 35s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 0s
checks / test (3.11, locked, ubuntu-latest)	1m 0s
checks / test (3.10, locked, ubuntu-latest)	1m 1s
checks / test (3.12, locked, ubuntu-latest)	1m 19s
checks / test (3.11, lowest-direct, windows-latest)	1m 32s
checks / test (3.14, locked, windows-latest)	2m 27s
checks / test (3.14, locked, ubuntu-latest)	2m 0s
checks / test (3.13, locked, ubuntu-latest)	55s
checks / test (3.13, lowest-direct, windows-latest)	1m 56s
checks / test (3.13, lowest-direct, ubuntu-latest)	59s
all-green	4s
	29m 25s

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